    <SEC-DOCUMENT>0001104659-20-052390-index.html : 20200428
    <SEC-HEADER>0001104659-20-052390.hdr.sgml : 20200428
    <ACCEPTANCE-DATETIME>20200428160912
    ACCESSION NUMBER:		0001104659-20-052390
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		5
    FILED AS OF DATE:		20200428
    DATE AS OF CHANGE:		20200428
    EFFECTIVENESS DATE:		20200428

    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:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-13412
    		FILM NUMBER:		20825063

    	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>DEFA14A
    <SEQUENCE>1
    <FILENAME>tm2015040d4_defa14a.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: tm2015040d4_defa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>image_001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: image_001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>image_002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: image_002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>image_003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: image_003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>image_004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: image_004.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>