<SEC-DOCUMENT>0001144204-12-042294.txt : 20120801
<SEC-HEADER>0001144204-12-042294.hdr.sgml : 20120801
<ACCEPTANCE-DATETIME>20120801153632
ACCESSION NUMBER:		0001144204-12-042294
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20120801
DATE AS OF CHANGE:		20120801

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HUDSON TECHNOLOGIES INC /NY
		CENTRAL INDEX KEY:			0000925528
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-MACHINERY, EQUIPMENT & SUPPLIES [5080]
		IRS NUMBER:				133641539
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-182526
		FILM NUMBER:		12999963

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 1541
		STREET 2:		ONE BLUE HILL PLAZA, 14TH FLOOR
		CITY:			PEARL RIVER
		STATE:			NY
		ZIP:			10965
		BUSINESS PHONE:		8457356000

	MAIL ADDRESS:	
		STREET 1:		PO BOX 1541
		STREET 2:		ONE BLUE HILL PLAZA, 14TH FLOOR
		CITY:			PEARL RIVER
		STATE:			NY
		ZIP:			10965

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	REFRIGERANT RECLAMATION INDUSTRIES INC
		DATE OF NAME CHANGE:	19940617
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>v320007_424b3.htm
<DESCRIPTION>FORM 424B3
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">Filed Pursuant to Rule 424(b)(3)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">Registration No. 333-182526</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">PROSPECTUS</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">HUDSON TECHNOLOGIES, INC.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">1,168,750
Shares of Common Stock</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">This prospectus relates to the offer and
sale by us of up to 1,168,750 shares of our common stock that are issuable upon the exercise of warrants originally issued by us
on July 7, 2010 pursuant to a prospectus dated September 5, 2008, and a related prospectus supplement dated July 1, 2010 (the &ldquo;warrants&rdquo;).
Each warrant is exercisable at any time until July 7, 2016.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We will receive the proceeds from any cash
exercises of the warrants. Our common stock is traded on the Nasdaq Capital Market under the trading symbol &ldquo;HDSN.&rdquo;
On July 31, 2012, the last reported sale price of our common stock on the Nasdaq Capital Market was $3.96 per share.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"><B>Investing in our securities involves
risks. See the risks and uncertainties described under the heading &ldquo;Risk Factors&rdquo; contained herein and in the other
documents that are incorporated by reference into this prospectus.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"><B>Neither the Securities and Exchange Commission
nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful
or complete. Any representation to the contrary is a criminal offense.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">The date of this prospectus is August 1,
2012.<FONT STYLE="font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<!-- Field: Page; Sequence: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font-size: 10pt"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">TABLE OF CONTENTS</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><U>Page</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 87%; padding-right: 0; padding-left: 0">PROSPECTUS SUMMARY</TD>
    <TD STYLE="width: 13%; padding-right: 0; padding-left: 0; text-align: right">2</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0">RISK FACTORS</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: right">2</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0">CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: right">3</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0">USE OF PROCEEDS</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: right">4</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0">DESCRIPTION OF CAPITAL STOCK</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: right">4</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0">PLAN OF DISTRIBUTION</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: right">5</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0">LEGAL MATTERS</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: right">6</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0">EXPERTS</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: right">6</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0">WHERE YOU CAN FIND MORE INFORMATION</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: right">6</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0">INFORMATION INCORPORATED BY REFERENCE</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: right">6</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 42.85pt; background-color: white">You should rely
only on the information contained or incorporated by reference in this prospectus. We have not authorized anyone to provide you
with information different from that contained in this prospectus. If anyone provides you with different or inconsistent information,
you should not rely on it. We are not offering to sell shares of common stock or seeking offers to buy shares of common stock in
any jurisdiction where offers and sales are not permitted. The information contained in this prospectus is accurate only as of
the date of this prospectus, regardless of the time of delivery of this prospectus or any sale of the common stock offered hereby.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 42.85pt; background-color: white">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<!-- Field: Page; Sequence: 2; Section: Main; Options: NewSection; Value: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->1<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">PROSPECTUS SUMMARY</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: italic 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">This summary is a brief discussion
of material information contained in, or incorporated by reference into, this prospectus as further described below. This summary
does not contain all of the information that you should consider before investing in our securities. We urge you to read carefully
this entire prospectus and the documents incorporated by reference into this prospectus before making an investment decision.</P>

<P STYLE="font: italic 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">About Hudson Technologies, Inc.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We are a refrigerant services company providing
innovative solutions to recurring problems within the refrigeration industry. Our products and services are primarily used in commercial
air conditioning, industrial processing and refrigeration systems, including (i) refrigerant sales, (ii) refrigerant management
services consisting primarily of reclamation of refrigerants and (iii) RefrigerantSide&reg; Services performed at a customer's
site, consisting of system decontamination to remove moisture, oils and other contaminants. In addition, RefrigerantSide&reg; Services
include predictive and diagnostic services for industrial and commercial refrigeration applications designed to predict potential
catastrophic problems and identify inefficiencies in an operating system. Our Chiller Chemistry&reg;, Chill Smart&reg;, Fluid Chemistry,
and Performance Optimization are predictive and diagnostic service offerings. As a component of our products and services, we also
participate in the generation of carbon offset projects. We operate through our wholly-owned subsidiary, Hudson Technologies Company.
Unless the context requires otherwise, references to the &quot;Company&quot;, &quot;Hudson&quot;, &quot;we&quot;, &quot;us&quot;,
&quot;our&quot;, or similar pronouns refer to Hudson Technologies, Inc. and its subsidiaries.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We were incorporated under the laws of the
State of New York. <FONT STYLE="color: black">Our executive offices are located at One Blue Hill Plaza, Pearl River, New York and
our telephone number is (845) 735-6000.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Our web site address is <FONT STYLE="color: #333333"><I><U>www.hudsontech.com</U></I></FONT>.
We have included our web site address in this document as an inactive textual reference only, and the information contained in,
or that can be accessed through, our web site does not constitute part of this prospectus.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">The Offering</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">This offering involves the offer and sale
by us of up to 1,168,750 shares of our common stock that are issuable upon the exercise of the warrants at an exercise price of
$2.60 per share. Each warrant is exercisable at any time until July 7, 2016. We will receive the proceeds from any cash exercises
of the warrants. Upon exercise of the warrants for cash, the holders of the warrants would pay us the exercise price per share
of common stock, or an aggregate of approximately $3,038,750 if the warrants are exercised in full for cash.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Use of Proceeds</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We intend to use the net proceeds from this
offering, if any, for working capital and/or general corporate purposes. See &ldquo;Use of Proceeds&rdquo; on page 4 of
this prospectus.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">NASDAQ Capital Market Listing</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Our common stock is listed on the NASDAQ
Capital Market under the symbol &ldquo;HDSN.&rdquo;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Risk Factors</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The securities offered by this prospectus
are speculative and involve a high degree of risk and investors purchasing securities should not purchase the securities unless
they can afford the loss of their entire investment. See &ldquo;Risk Factors&rdquo; beginning on page&nbsp;2 of this prospectus.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">RISK FACTORS</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Any investment in our securities involves
a high degree of risk. You should consider carefully the risk factors described in our periodic reports filed with the Securities
and Exchange Commission, or SEC, including the risks, uncertainties and assumptions discussed under the heading &ldquo;Risk Factors&rdquo;
included in our most recent annual report on Form 10-K, as such may be revised or supplemented prior to the completion of this
offering by more recently filed quarterly reports on Form 10-Q, each of which is or upon filing will be incorporated herein by
reference, and which may be amended, supplemented or superseded from time to time by other reports we file with the SEC in the
future, as well as other information in this prospectus and the documents incorporated by reference herein before purchasing any
of our securities. Each of these risk factors could adversely affect our business, operating results and financial condition, as
well as adversely affect the value of an investment in our securities. Additional risks and uncertainties not presently known to
us or that we currently deem immaterial may also impair our business, operating results, prospects or financial condition.<FONT STYLE="font-size: 10pt; color: black">
</FONT>The risks discussed below also include forward-looking statements and our actual results may differ substantially from those
discussed in these forward-looking statements.</P>

<P STYLE="font: italic 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;&nbsp;</P>

<!-- Field: Page; Sequence: 3; Section: Main; Value: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->2<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; text-align: center; margin-bottom: 0pt">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; text-align: center; margin-bottom: 0pt">Additional Risks Relating
to This Offering</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: italic bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We will have broad discretion
over the use of the proceeds to us from this offering and may apply the proceeds to uses that do not improve our operating results
or the value of your securities.</P>

<P STYLE="font: italic bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We will have broad discretion to use the
net proceeds to us from this offering, if any, and investors will be relying solely on the judgment of our board of directors and
management regarding the application of these proceeds. Although we expect to use the net proceeds from this offering for working
capital and/or general corporate purposes, we have not allocated these net proceeds for specific purposes. Investors will not have
the opportunity, as part of their investment decision, to assess whether the proceeds are being used appropriately. Our use of
the proceeds may not improve our operating results or increase the value of the securities being offered hereby.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: italic bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Because many of our existing
investors may have paid substantially less than the offering price for the shares to be sold in this offering when they purchased
their shares, new investors will incur immediate and substantial dilution in their investment.</P>

<P STYLE="font: italic bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Investors purchasing shares of common stock
in this offering will incur immediate and substantial dilution in net tangible book value per share because the price that new
investors pay will be substantially greater than the net tangible book value per share of the shares acquired.&nbsp;&nbsp;This
dilution is due in large part to the fact that many of our existing investors paid substantially less than the offering price for
the shares to be sold in this offering when they purchased their shares of common stock.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: italic bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">You may experience future dilution
as a result of future equity offerings.</P>

<P STYLE="font: italic bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">In order to raise additional capital, we
may in the future offer additional shares of our common stock or other securities convertible into or exchangeable for our common
stock at prices that may not be the same as the price per share in this offering. We may sell shares or other securities in any
other offering at a price per share that is less than the price per share paid by investors in this offering, and investors purchasing
shares or other securities in the future could have rights superior to existing stockholders. The price per share at which we sell
additional shares of our common stock, or securities convertible or exchangeable into common stock, in future transactions may
be higher or lower than the price per share paid by investors in this offering.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"><FONT STYLE="color: black"><B><I>Future
sales of substantial amounts of common stock in the public market, or the perception that such sales may occur, could adversely
affect the market price of our common stock</I></B></FONT><B><I>.</I></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The holders of the warrants will not be
restricted as to the price or prices at which they may sell their shares upon exercise of the warrants. Sales of shares by such
holders may depress the market price of our common stock since the number of shares which may be sold by them may be relatively
large compared to the historical average weekly trading of our common stock. Accordingly, if the holders of the warrants were to
sell, or attempt to sell, all or a substantial portion of such shares at once or during a short time period, we believe such transactions
could adversely affect the market price of our common stock.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">CAUTIONARY NOTE REGARDING FORWARD-LOOKING
STATEMENTS</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">This prospectus and the documents incorporated
by reference herein contain statements that we believe are &ldquo;forward-looking statements&rdquo; as that term is used in the
Private Securities Litigation Reform Act of 1995 and are intended to enjoy protection of the safe harbor for forward-looking statements
provided by that Act. These forward-looking statements are based on our current expectations, assumptions, estimates and projections
about our business and our industry. Forward-looking statements include statements regarding our future financial position, performance
and achievements, business strategy, and plans and objectives of management for future operations.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<!-- Field: Page; Sequence: 4; Section: Main; Value: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->3<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">In some cases, you can identify forward-looking
statements by terms such as &ldquo;may,&rdquo; &ldquo;should,&rdquo; &ldquo;will,&rdquo; &ldquo;could,&rdquo; &ldquo;estimate,&rdquo;
&ldquo;project,&rdquo; &ldquo;predict,&rdquo; &ldquo;potential,&rdquo; &ldquo;continue,&rdquo; &ldquo;anticipate,&rdquo; &ldquo;believe,&rdquo;
&ldquo;plan,&rdquo; &ldquo;seek,&rdquo; &ldquo;expect,&rdquo; &ldquo;future&rdquo; and &ldquo;intend&rdquo; or the negative of
these terms or other comparable expressions which are intended to identify forward-looking statements. These statements are only
predictions and are not guarantees of future performance. They are subject to known and unknown risks, uncertainties and other
factors, some of which are beyond our control and difficult to predict and could cause our actual results to differ materially
from those expressed or forecasted in, or implied by, the forward-looking statements. In evaluating these forward-looking statements,
you should carefully consider the risks and uncertainties referred to under the caption &ldquo;Risk Factors&rdquo; above and elsewhere
in this prospectus, including those described in documents incorporated by reference herein. Given these uncertainties, you should
not place undue reliance on these forward-looking statements. In addition, these forward-looking statements reflect our view only
as of the date they are made.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Except as required by law, we assume no
obligation to update these forward-looking statements publicly, or to update the reasons actual results could differ materially
from those anticipated in these forward-looking statements, even if new information becomes available in the future.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">All forward-looking statements attributable
to us or persons acting on our behalf are expressly qualified in their entirety by these cautionary statements.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">USE OF PROCEEDS</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We will receive the proceeds from any cash
exercises of the warrants. The holders of the warrants are not obligated to exercise their warrants and we cannot predict whether
holders will choose to exercise all or any of their warrants. We intend to use the net proceeds from this offering, if any, for
working capital and/or general corporate purposes.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We will pay certain expenses related to
the registration of the offer and sale or resale of the shares of our common stock pursuant to the registration statement of which
this prospectus forms a part. The holders of shares issuable upon exercise of the warrants will be responsible for all other costs
and expenses in connection with the sale of their shares of common stock, including brokerage commissions or dealer discounts.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Pending their ultimate use, we intend to
invest the net proceeds in money market funds and government backed debt securities.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; text-align: center; margin-bottom: 0pt">DESCRIPTION OF CAPITAL STOCK</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.5in; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The following description summarizes the
material terms of our capital stock. This summary is, however, subject to the provisions of our certificate of incorporation, as
amended, and any applicable certificate of designations for a series of preferred stock, and the provisions of applicable law.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Common Stock</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Hudson is authorized to issue 50,000,000
shares of common stock. As of July 31, 2012, there were 23,873,392 shares of common stock outstanding.&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The holders of common stock are entitled
to one vote for each share held of record on all matters to be voted on by stockholders. There is no cumulative voting with respect
to the election of directors, with the result that the holders of more than 50% of the shares voting for the election of directors
can elect all of the directors then up for election. The holders of common stock are entitled to receive dividends when, as and
if declared by our board of directors out of funds legally available therefor. In the event of liquidation, dissolution or winding
up of Hudson, the holders of common stock are entitled to share in all assets remaining which are available for distribution to
them after payment of liabilities and after provision has been made for each class of stock, if any, having preference over the
common stock. Holders of shares of common stock have no conversion, preemptive or other subscription rights, and there are no redemption
provisions applicable to the common stock. All of the outstanding shares of common stock are fully paid and non-assessable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<!-- Field: Page; Sequence: 5; Section: Main; Value: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->4<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Our common stock is listed on the NASDAQ
Capital Market under the symbol &ldquo;HDSN.&rdquo; The transfer agent and registrar for the common stock is Continental Stock
Transfer &amp; Trust Company, New York, New York.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Preferred Stock</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Hudson is authorized to issue 5,000,000
shares of&nbsp;preferred stock. As of July 31, 2012, there were 150,000 shares of preferred stock designated as Series A Convertible
Preferred Stock and no shares of preferred stock outstanding. Hudson has no intent to issue any shares of its Series A Convertible
Preferred Stock.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Under our certificate of incorporation,
as amended, we have the authority to issue 5,000,000 shares of preferred stock. The authorized preferred stock can be issued from
time to time in one or more series. Our board of directors has the power, without stockholder approval, to issue shares of one
or more series of preferred stock, at any time, for such consideration and with such relative rights, privileges, preferences and
other terms as the board may determine, including terms relating to dividend rates, redemption rates, liquidation preferences and
voting, sinking fund and conversion or other rights. The rights and terms relating to any new series of preferred stock could adversely
affect the voting power or other rights of the holders of the common stock or could be utilized, under certain circumstances, as
a method of discouraging, delaying or preventing a change in control of Hudson.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Anti-Takeover Considerations and Special Provisions of
our Certificate of Incorporation and our By-laws</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">A number of provisions of both our certificate
of incorporation, as amended, and our amended and restated by-laws concern matters of corporate governance and the rights of our
stockholders. Our board of directors is divided into two classes. Each class is to have a term of two years, with the term of each
class expiring in successive years, and is to consist, as nearly as possible, of one-half of the number of directors constituting
the entire board. Under certain circumstances, at least two annual meetings of stockholders, instead of one, may be required to
effect a change in a majority of our board of directors. The classification of our board into two separate classes could discourage,
delay, or prevent a takeover of us thereby preserving control by the current stockholders. In addition, provisions that grant our
board of directors the ability to issue shares of preferred stock and to set the voting rights, preferences and other terms thereof
may discourage takeover attempts that are not first approved by our board of directors, including takeovers which may be considered
by some stockholders to be in their best interests. Certain provisions could delay or impede the removal of incumbent directors
or the assumption of control by stockholders, even if such removal or assumption would be beneficial to our stockholders. These
provisions also could discourage or make more difficult a merger, tender offer or proxy contest, even if they could be favorable
to the interests of stockholders, and could potentially depress the market price of our common stock. Our board of directors believes
that these provisions are appropriate to protect our interests and the interests of our stockholders.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">PLAN OF DISTRIBUTION</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The shares of common stock issuable upon
exercise of the warrants referenced on the cover page&nbsp;of this prospectus will be offered solely by us and will be issued and
sold upon the exercise of the warrants. For the holders of warrants to exercise such warrants, the shares issuable upon exercise
must either be registered under the Securities Act, or exempt from registration.&nbsp;If a registration statement registering the
issuance of the shares of common stock underlying the warrants under the Securities Act is not effective or available for the issuance
of such shares, the holder may, in its sole discretion, elect to exercise the warrant through a cashless exercise, in which case
the holder would receive upon such exercise the net number of shares of common stock determined according to the formula set forth
in the warrant. No fractional shares of common stock will be issued in connection with the exercise of a warrant. In lieu of fractional
shares, we will pay the holder an amount in cash equal to the fractional amount multiplied by the market value of a share of common
stock.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We will pay certain expenses related to
the registration of the offer and sale of the shares of our common stock pursuant to the registration statement of which this prospectus
forms a part. The holders of shares issuable upon exercise of the warrants will be responsible for all other costs and expenses
in connection with the sale of their shares of common stock, including brokerage commissions or dealer discounts.<FONT STYLE="font-family: Times New Roman, Times, Serif">
</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<!-- Field: Page; Sequence: 6; Section: Main; Value: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->5<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We may suspend the use of this prospectus
for any period and at any time, including, without limitation, in the event of pending corporate developments, public filings with
the SEC, and similar events.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">LEGAL MATTERS</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The validity of the securities being offered
by this prospectus will be passed upon for us by Blank Rome LLP, New York, New York.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">EXPERTS</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The financial statements as of December
31, 2011 and 2010 and for each of the years then ended incorporated by reference herein have been so incorporated in reliance on
the report of BDO USA, LLP, an independent registered public accounting firm, incorporated herein by reference, given on the authority
of said firm as experts in auditing and accounting.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">WHERE YOU CAN FIND MORE INFORMATION</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We are subject to the informational requirements
of the Securities Exchange Act of 1934 (&ldquo;Exchange Act&rdquo;), and we file reports and other information with the SEC.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">You may read and copy any of the reports,
statements, or other information we file with the SEC at its Public Reference Section at 100 F Street, N.E., Room 1580, Washington,
D.C. 20549 at prescribed rates. Information on the operation of the Public Reference Room may be obtained by calling the SEC at
1-800-SEC-0330. The SEC also maintains a Web site at<I> http://www.sec.gov</I> that contains reports, proxy statements and other
information regarding issuers that file electronically with the SEC. In addition, the Nasdaq Stock Market maintains a Web site
at <I>http://www.nasdaq.com</I> that contains reports, proxy statements and other information filed by us.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Our internet address is <FONT STYLE="color: #333333"><I>www.hudsontech.com</I></FONT>.
We make available free of charge, on or through our web site, annual reports on Form 10-K, quarterly reports on form 10-Q, current
reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section&nbsp;13(a) or 15(d) of the Exchange
Act as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. Information contained
on our web site is not part of this prospectus.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">This prospectus constitutes a part of a
registration statement on Form S-3 that we have filed with the SEC under the Securities Act. This prospectus does not contain all
of the information set forth in the registration statement, certain parts of which are omitted in accordance with the rules and
regulations of the SEC. For further information about us and our securities we refer you to the registration statement and the
accompanying exhibits and schedules. The registration statement may be inspected at the Public Reference Room maintained by the
SEC at the address set forth in the first paragraph of this section. Statements contained in this prospectus regarding the contents
of any contract or any other document filed as an exhibit are not necessarily complete. In each instance, reference is made to
the copy of such contract or document filed as an exhibit to the registration statement, and each statement is qualified in all
respects by that reference.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">INFORMATION INCORPORATED BY REFERENCE</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The SEC allows us to &ldquo;incorporate
by reference&rdquo; into this prospectus the information we file with them. This means that we may disclose important information
to you by referring you to other documents filed separately with the SEC. The information we incorporate by reference into this
prospectus is legally deemed to be a part of this prospectus, except for any information superseded by other information contained
in, or incorporated by reference into, this prospectus. Any statement contained in a document incorporated or deemed to be incorporated
by reference into this prospectus will be deemed to be modified or superseded for purposes of this prospectus to the extent that
a statement contained in this prospectus or any other subsequently filed document that is deemed to be incorporated by reference
into this prospectus modifies or supersedes the statement. Any statement so modified or superseded will not be deemed, except as
so modified or superseded, to constitute a part of this prospectus. Our SEC File Number for documents we filed under the Exchange
Act is 001-13412.The following documents filed by us with the SEC are hereby incorporated by reference in this prospectus:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<!-- Field: Page; Sequence: 7; Section: Main; Value: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->6<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 1in; padding-right: 0; padding-left: 0"></TD><TD STYLE="width: 0.5in; padding-right: 0; padding-left: 0"><FONT STYLE="font-family: Symbol">&middot;</FONT></TD><TD STYLE="text-align: justify; padding-right: 0; padding-left: 0">our annual report on Form 10-K (including the information incorporated by reference therein) for
the fiscal year ended December&nbsp;31, 2011;</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 1in; padding-right: 0; padding-left: 0"></TD><TD STYLE="width: 0.5in; padding-right: 0; padding-left: 0"><FONT STYLE="font-family: Symbol">&middot;</FONT></TD><TD STYLE="text-align: justify; padding-right: 0; padding-left: 0">our quarterly report on Form 10-Q for the quarter ended March&nbsp;31, 2012; </TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 1in; padding-right: 0; padding-left: 0"></TD><TD STYLE="width: 0.5in; padding-right: 0; padding-left: 0"><FONT STYLE="font-family: Symbol">&middot;</FONT></TD><TD STYLE="text-align: justify; padding-right: 0; padding-left: 0">our current report on Form 8-K  filed with
                                                                                                                                                                                 the SEC on June 28, 2012; and</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 1in; padding-right: 0; padding-left: 0"></TD><TD STYLE="width: 0.5in; padding-right: 0; padding-left: 0"><FONT STYLE="font-family: Symbol">&middot;</FONT></TD><TD STYLE="text-align: justify; padding-right: 0; padding-left: 0">the description of our common stock contained in our registration statement on Form 8-A, filed
with the SEC pursuant to Section&nbsp;12(g) of the Exchange Act and all amendments or reports filed by us for the purpose of updating
those descriptions.</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">All reports and other
documents subsequently filed by us pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act after the effective
time of the registration statement of which this prospectus forms a part and prior to the termination of this offering also
shall be deemed to be incorporated by reference in this prospectus and to be part hereof from the dates of filing of such
reports and other documents; provided, however, that we are not incorporating any information furnished under either
Item&nbsp;2.02 or Item&nbsp;7.01 of any Current Report on Form 8-K.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">We hereby undertake to provide without charge
to each person, including any beneficial owner, to whom a copy of this prospectus is delivered, upon written or oral request of
any such person, a copy of any and all of the information that has been or may be incorporated by reference in this prospectus,
other than exhibits to such documents, unless the exhibits are specifically incorporated by reference into the documents that this
prospectus incorporates. Requests for such copies should be directed to our corporate secretary, at the following address or by
calling the following telephone number:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Hudson Technologies, Inc.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">P.O. Box 1541</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">One Blue Hill Plaza</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Pearl River, NY 10965</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Telephone: (845)&nbsp;735-6000</P>



<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

<!-- Field: Page; Sequence: 8; Section: Main; Options: Last -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif"><TR><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->7<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <!-- Field: /Page -->
<P STYLE="margin: 0"></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
