<SUBMISSION>
<ACCESSION-NUMBER>0001010541-03-000009
<TYPE>4/A
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20011023
<FILING-DATE>20031218
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>MORCH OTTO C
<CIK>0001250698
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4/A
<ACT>34
<FILE-NUMBER>001-13412
<FILM-NUMBER>031061633
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>C/O HUDSON TECHNOLOGIES INC
<STREET2>275 NORTH MIDDLETOWN ROAD
<CITY>PEARL RIVER
<STATE>NY
<ZIP>10967
<PHONE>8457356000
</BUSINESS-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>HUDSON TECHNOLOGIES INC /NY
<CIK>0000925528
<ASSIGNED-SIC>5080
<IRS-NUMBER>133641539
<STATE-OF-INCORPORATION>NY
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>275 N MIDDLETOWN RD
<CITY>PEARL RIVER
<STATE>NY
<ZIP>10965
<PHONE>8457356000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>275 N MIDDLETOWN RD
<CITY>PEARL RIVER
<STATE>NY
<ZIP>10965
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>REFRIGERANT RECLAMATION INDUSTRIES INC
<DATE-CHANGED>19940617
</FORMER-COMPANY>
</ISSUER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2001-10-23</periodOfReport>

    <dateOfOriginalSubmission>2003-12-11</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000925528</issuerCik>
        <issuerName>HUDSON TECHNOLOGIES INC /NY</issuerName>
        <issuerTradingSymbol>hdsnc</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001250698</rptOwnerCik>
            <rptOwnerName>MORCH OTTO C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>44 GREENWICH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MANCHESTER</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>08759</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>

        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2003-10-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.1</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1600</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

    </nonDerivativeTable>



    <ownerSignature>
        <signatureName>Otto C. Morch, by Stephen P. Mandracchia, Attorney in fact</signatureName>
        <signatureDate>2003-12-18</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
