WASHINGTON, DC 20549

                                   FORM 12b-25

                             COMMISSION FILE NUMBER

                           NOTIFICATION OF LATE FILING

(Check One):      |X| Form 10-K  |_| Form 11-K  |_| Form 20-F  |_| Form 10-Q
                           |_| Form N-SAR

      For Period Ended: December 31, 2002

      |_| Transition Report on Form 10-K

      |_| Transition Report on Form 20-F

      |_| Transition Report on Form 11-K

      |_| Transition Report on Form 10-Q

      |_| Transition Report on Form N-SAR

      For the Transition Period Ended:______________________________________

Read Instruction (on back page) Before Preparing Form. Please Print or Type.

      Nothing in this form shall be construed to imply that the Commission has
verified any information contained herein.

      If the notification relates to a portion of the filing checked above,
identify the item(s) to which the notification relates:



Hudson Technologies, Inc.
Full Name of Registrant

Former Name If Applicable

275 North Middletown Road
Address of Principal Executive Office (Street and Number)

Pearl River, New York  10965
City, State and Zip Code

PART II -- RULE 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense
and the registrant seeks relief pursuant to Rule 12b-25(b), the following should
be completed. (Check box if appropriate.)

            (a)   The reasons described in reasonable detail in Part III of this
                  form could not be eliminated without unreasonable effort or

            (b)   The subject annual report, semi-annual report, transition
                  report on Form 10-K, Form 20-F, Form 11-K or Form N-SAR, or
                  portion thereof, will be filed on or before the fifteenth
|X|               calendar day following the prescribed due date; or the subject
                  quarterly report or transition report on Form 10-Q, or portion
                  thereof will be filed on or before the fifth calendar day
                  following the prescribed due date; and

            (c)   The accountant's statement or other exhibit required by Rule
                  12b-25(c) has been attached if applicable.


State below in reasonable detail why the Form 10-K, 11-K, 20-F 10-Q, N-SAR or
the transition report portion thereof could not be filed within the prescribed
time period. (Attach Extra Sheets if Needed.)

      The Form 10-KSB for the fiscal year ended December 31, 2002 could not be
      filed within the prescribed time period due to unanticipated delays
      arising in connection with its preparation.


(1)   Name and telephone number of person to contact in regard to this

      Stephen P. Mandracchia              (845)             735-6000
            (Name)                        (Area Code)       (Telephone Number)

(2)   Have all other periodic reports required under Section 13 or 15(d) of the
      Securities Exchange Act of 1934 or Section 30 of the Investment Company
      Act of 1940 during the preceding 12 months or for such shorter period that
      the registrant was required to file such report(s) been filed? If the
      answer is no, identify report(s).

                                                                  |X| Yes |_| No

(3)   Is it anticipated that any significant change in results of operations
      from the corresponding period for the last fiscal year will be reflected
      by the earnings statements to be included in the subject report or portion

                                                                  |X| Yes |_| No

      If so, attach an explanation of the anticipated change, both narratively
and quantitatively, and, if appropriate, state the reasons why a reasonable
estimate of the results cannot be made.

      See Attachment

                            Hudson Technologies, Inc.
                  (Name of Registrant as Specified in Charter)

has caused this notification to be signed on its behalf by the undersigned
thereunto duly authorized.

Date: March 31, 2003                    By:      /s/ Stephen P. Mandracchia
                                                 Stephen P. Mandracchia
                                                 Vice President of Operations

INSTRUCTION: The form may be signed by an executive officer of the registrant or
by any other duly authorized representative. The name and title of the person
signing the form shall be typed or printed beneath the signature. If the
statement is signed on behalf of the registrant by an authorized representative
(other than an executive officer), evidence of the representative's authority to
sign on behalf of the registrant shall be filed with the form.


   Intentional misstatements or omissions of fact constitute Federal Criminal
                        Violations (see 18 U.S.C. 1001).

                        ATTACHMENT TO PART IV-ITEM (3) OF
                                   FORM 12B-25
                            HUDSON TECHNOLOGIES, INC.

                     WITH RESPECT TO ITS FORM 10-KSB FOR THE
                          YEAR ENDED DECEMBER 31, 2002

      The registrant estimates that its results of operations for the year ended
December 31, 2002, as reflected in its consolidated statements of operations to
be included in its Form 10-KSB for the year ended December 31, 2002 ("Fiscal
2002"), will reflect the following changes:

      A decrease in total revenues to approximately $19,963,000 for Fiscal 2002
as compared to total revenues of $20,768,000 for the year ended December 31,
2001 ("Fiscal 2001").

      In addition, the registrant expects to report that loss from operations
increased to approximately $2,453,000 for Fiscal 2002 as compared to $2,220,000
for Fiscal 2001; and net loss increased to approximately $2,522,000 for Fiscal
2002 as compared to $2,399,000 for Fiscal 2001.