Exhibit 23.1:

               Consent of Independent Certified Public Accountants

Hudson Technologies, Inc.
Pearl River, New York

We  hereby  consent  to the  incorporation  by  reference  in  the  Registration
Statements  (No.  333-17133  and No.  333-38598) on Form S-8 of our report dated
March 1, 2002,  relating  to the  consolidated  financial  statements  of Hudson
Technologies,  Inc.  for the year  ended  December  31,  2001  appearing  in the
Company's Annual Report on Form 10-KSB for the year ended December 31, 2001.


                                                            /s/ BDO SEIDMAN, LLP

Valhalla, New York
March 28, 2002


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