Exhibit 99.7

                           RIGHTS OFFERING FOR SHARES
                                 OF COMMON STOCK
                                       OF

                            HUDSON TECHNOLOGIES, INC.

                                 August __, 2003

To Our Clients:

      We are enclosing for your consideration a Prospectus (the "Prospectus")
dated August __, 2003, describing the issuance to stockholders of record of
Hudson Technologies, Inc. ("Hudson") on August 1, 2003 (the "Record Date"), of
non-transferable rights ("Rights") which may be exercised to purchase, at the
Subscription Price (as defined below), shares of common stock, par value $.01
per share (the "Common Stock") of Hudson.

      Your attention is directed to the following:

            o     Hudson stockholders will receive one (1) Right for each share
                  of Common Stock of Hudson held as of the Record Date. This is
                  referred to as the "Basic Subscription Right." No fractional
                  Rights or cash in lieu thereof will be paid, and the number of
                  Rights distributed to each holder of Common Stock will be
                  rounded [up] to the nearest whole number of rights.

            o     The Rights are non-transferable and have not been approved for
                  trading on any national securities exchange or the Nasdaq
                  Stock Market.

            o     Basic Subscription Right: One Right will entitle the holder to
                  purchase one share of Common Stock of Hudson at the
                  Subscription Price of $_____ per share (the "Subscription
                  Price"). In order for a holder of Rights to be able to
                  exercise his or her Over-Subscription Privilege, that holder
                  must exercise his or her Basic Subscription Right in full.

            o     Over-Subscription Privilege: Any holder of Rights who fully
                  exercises all Rights held by him or her under the Basic
                  Subscription Right is entitled to subscribe, at the
                  Subscription Price, for shares that were not otherwise
                  subscribed for by other stockholders under their Basic
                  Subscription Rights. However, if over-subscriptions received
                  by Hudson exceed the number of shares available, the shares
                  available will be proportionally allocated among those who
                  oversubscribed based on the number of shares subscribed for by
                  such holders pursuant to the Basic Subscription Privilege, as
                  more fully described in the Prospectus.

            o     Hudson has established a minimum share purchase requirement in
                  this Rights offering of 1,000 shares of Common Stock.
                  Therefore, all subscriptions resulting from the exercise of
                  Rights must be for a minimum of 1,000 shares. However, even if
                  a holder's Basic Subscription Right amounts to less than 1,000
                  shares, that holder may still participate by exercising all of
                  his or her Basic Subscription



                  Right as well as a sufficient number of Rights under the
                  Over-Subscription Privilege to meet the 1,000 share purchase
                  requirement. Please note however, that Hudson may be required
                  to proportionally reduce all Over-Subscription exercises in
                  the event an insufficient number of shares are available
                  therefor. In that case your subscription may be reduced below
                  the 1,000 share minimum purchase requirement.

            o     The expiration date of the Rights offering is 5:00 p.m.,
                  Eastern Time, on September __, 2003, unless extended by Hudson
                  in its discretion (the "Expiration Date").

      Since we are the holder of record of the shares of Common Stock of Hudson
held in your account, we have received your non-transferable Rights. We will
exercise or sell your Rights only in accordance with your instructions. IF YOU
DO NOT GIVE US YOUR INSTRUCTIONS, YOUR RIGHTS WILL BECOME VALUELESS AFTER THE
EXPIRATION DATE.

      Your Rights will expire as of the Expiration Date. Therefore if you would
like to participate and exercise your Rights for the purchase of shares of
Common Stock of Hudson, please forward your instructions to us immediately by
completing the enclosed Beneficial Owner Election Form.