Exhibit 31.1:

Hudson Technologies, Inc.

Certification of Principal Executive Officer

I, Kevin J. Zugibe, Chief Executive Officer and Chairman of the Board, of Hudson Technologies, Inc., certify that:

|1. | I have reviewed this quarterly report on Form 10-QSB of Hudson Technologies, Inc.;                                                                                                                                                                                                                                               
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|2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;                       
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|3. | Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the small business issuer as of, and for, the periods presented in this report;                               
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|4. | The small business issuer's other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the small business issuer and have:                                                                               
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|   | a)                                                                                                                                                                                                                                                                                                                               
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|   | b)                                                                                                                                                                                                                                                                                                                               
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|   | c)                                                                                                                                                                                                                                                                                                                               
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|5. | The small business issuer's other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the small business issuer's auditors and the audit committee of the small business issuer's board of directors (or persons performing the equivalent functions):
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|   | a)                                                                                                                                                                                                                                                                                                                               
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|   | b)                                                                                                                                                                                                                                                                                                                               





|Date:  November 4, 2005
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|/s/ Kevin J. Zugibe        
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|Kevin J. Zugibe            
|Chief Executive Officer and
|Chairman of the Board