EXHIBIT 99.6


                         THE GENERAL CHEMICAL GROUP INC.

                       [__________] SHARES OF COMMON STOCK
               OFFERED PURSUANT TO SUBSCRIPTION RIGHTS DISTRIBUTED
                       BY THE GENERAL CHEMICAL GROUP INC.
                               TO ITS SHAREHOLDERS

      To Our Clients:

            This letter and the materials accompanying it are being distributed
      to you as the beneficial owner of the shares of common stock (the "Common
      Stock") of The General Chemical Group Inc. ("GCG") held of record by us
      for you in your account. We received the materials accompanying this
      letter from GCG in connection with its offering of [__________]
      newly-issued shares of its Common Stock, for a subscription price of
      $[____] per share (the "Subscription Price"), pursuant to subscription
      rights (the "Rights") distributed by GCG to the holders of record of its
      Common Stock as of the close of business on [__________], 2001 (the
      "Record Date"). The Rights are described in the Prospectus, dated [__],
      2001, that accompanies this letter.

            You have received [____] Rights for each share of Common Stock
      carried by us in your account as of the Record Date. GCG is not granting
      fractional Rights; if a fractional Right would have been calculated for a
      shareholder as a result of the ratio described above, the number of Rights
      granted to such shareholder has been rounded up to the nearest whole
      Right. You are permitted to purchase one (1) share of Common Stock for
      each whole Right you received at the Subscription Price. This is your
      "Basic Subscription Privilege". You also have the right to subscribe, at
      the Subscription Price, for the shares remaining after satisfaction of all
      subscriptions pursuant to the Basic Subscription Privilege. This is your
      "Oversubscription Privilege". If there are insufficient remaining shares
      to satisfy all exercised Oversubscription Privileges, such remaining share
      will be allocated prorata among all holders of Rights exercising
      Oversubscription Privileges, in proportion to the number of shares each
      holder purchases pursuant to his or her Basic Subscription Privilege. You
      must exercise your Oversubscription Privilege (or not) at the time you
      exercise your Basic Subscription Privilege, and you must exercise your
      Basic Subscription Privilege in full in order to exercise your
      Oversubscription Privilege.

            In general, your Rights are not transferable. You may, however,
      transfer your Rights to your immediate relatives (i.e., your spouse,
      children and parents), to entities wholly-owned or controlled by you and
      to certain other permitted transferees more fully described in the
      Prospectus.

            You may only exercise your Rights through us. We are sending you the
      materials accompanying this letter as the beneficial owner of the share of
      Common Stock carried by us in your account but not registered in your
      name. Accordingly, we request instructions as to whether you wish us to
      exercise your Basic Subscription and Oversubscription Privileges. We urge
      you to read the materials accompanying this letter--particularly the
      Prospectus--before delivering such instructions to us.

            If you would like us to exercise your Rights on your behalf, please
      complete and return to us the instruction form on the back of this letter.
      Kindly forward your instructions to us as promptly as possible, so that we
      may exercise your Rights on your behalf prior to [______], at 5:00 P.M.,
      New York City time, at which time the offering will expire (unless it is
      extended by GCG). Please note that, once we have exercised your Rights on
      your behalf, such exercise cannot be revoked.

      If you have any questions concerning the offering, please contact Mellon
Bank, N.A., c/o Mellon Investor Services LLC, the subscription agent for the
offering, at (toll free) 1 (888) 232-7873.