SEE RESTRICTIVE LEGEND ON REVERSE SIDE

                  INCORPORATED UNDER THE LAWS OF
                             DELAWARE

No. ****                                              Shares ****

              PERMA-FIX ENVIRONMENTAL SERVICES, INC.

           SERIES 14 CLASS N CONVERTIBLE PREFERRED STOCK
                    Par Value $.001 Per Share

THIS CERTIFIES THAT - - S P E C I M E N - - is the owner of ****
*************** (******) shares of Series 14 Class N Convertible
Preferred Stock of
              Perma-Fix Environmental Services, Inc.
transferable only on the books of the Corporation by the holder
hereof in person or by attorney upon surrender of this
Certificate properly endorsed.

In Witness Whereof, the said Corporation has caused this
Certificate to be signed by its duly authorized officers and to
be sealed with the Seal of the Corporation this ____ day of
________,1999.


_____________________________      ______________________________
                   Secretary                            President

                        SHARES $.001 EACH


     NEITHER THIS PREFERRED STOCK NOR ANY SHARES OF COMMON STOCK
ISSUABLE UPON THE CONVERSION OF THIS PREFERRED STOCK HAVE BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
"SECURITIES ACT") OR QUALIFIED UNDER APPLICABLE STATE SECURITIES
LAWS.  THIS PREFERRED STOCK AND THE COMMON STOCK ISSUABLE UPON
CONVERSION OF THIS PREFERRED STOCK MAY NOT BE OFFERED, SOLD,
PLEDGED, HYPOTHECATED OR OTHERWISE TRANSFERRED IN THE ABSENCE OF
AN EFFECTIVE REGISTRATION STATEMENT AND QUALIFICATION IN EFFECT
WITH RESPECT THERETO UNDER THE SECURITIES ACT AND UNDER ANY
APPLICABLE STATE SECURITIES LAW OR WITHOUT THE PRIOR WRITTEN
CONSENT OF PERMA-FIX ENVIRONMENTAL SERVICES, INC. AND AN OPINION
OF PERMA-FIX ENVIRONMENTAL SERVICES, INC.'S COUNSEL, OR AN
OPINION FROM COUNSEL FOR THE HOLDER HEREOF, WHICH OPINION IS
SATISFACTORY TO THE COMPANY, THAT SUCH REGISTRATION AND
QUALIFICATION IS NOT REQUIRED UNDER APPLICABLE FEDERAL AND STATE
SECURITIES LAWS OR AN EXEMPTION THEREFROM.
     NOTWITHSTANDING THE FOREGOING, THESE SHARES OF COMMON STOCK
ARE ALSO SUBJECT TO THE REGISTRATION RIGHTS SET FORTH IN THAT
CERTAIN EXCHANGE AGREEMENT BY AND BETWEEN THE HOLDER HEREOF AND
THE COMPANY, DATED AS OF AUGUST 3, 1999, A COPY OF WHICH IS ON
FILE AT THE COMPANY'S PRINCIPAL EXECUTIVE OFFICE.
                       *******************
                           CERTIFICATE
                               FOR
                               ****
                              SHARES
                              of the
                          CAPITAL STOCK
                                of
              Perma-Fix Environmental Services, Inc.

           Series 14 Class N Convertible Preferred Stock
                    Par Value $.001 Per Share

                            ISSUED TO
                    **** S P E C I M E N ****

                              DATED
                        ___________, 1999
                       ********************


     For Value Received, __________ hereby sell, assign and
transfer unto __________________________________________________
___________________ Shares of the Capital Stock represented by
the within Certificate, and do hereby irrevocably constitute and
appoint _________________________________________ to transfer the
said Stock on the books of the within named Corporation with full
power of substitution in the premises.

     Dated __________________, 19______.

     In presence of ________________________________________