JOINT FILING AGREEMENT

This JOINT FILING  AGREEMENT is made and entered into by and among Iridian Asset
Management LLC, COLE Partners LLC,  Iridian Private  Business Value Equity Fund,
L.P.,  Iridian Partners Fund,  L.P.,  Renoma Partners LLC, Iridian Charter Fund,
LP, David L. Cohen and Harold J. Levy.


The parties to this  Agreement  hereby agree to prepare  jointly and file timely
(or otherwise  deliver as appropriate)  all filings on Schedule 13D and Schedule
13G (the  "Filings")  required to be filed by them  pursuant to Section 13(d) or
13(g) under the  Securities  Exchange Act of 1934,  as amended,  with respect to
their respective ownership of any securities of Enzon Pharmaceuticals, Inc. that
are required to be reported on any Filings. Each party to this Agreement further
agrees and covenants to the other parties that it will fully cooperate with such
other parties in the  preparation  and timely filing (and other delivery) of all
such Filings.

Date: July 27, 2009


                              IRIDIAN ASSET MANAGEMENT LLC

                         By:  /s/ Jeffrey M. Elliott
                              ----------------------------------
                              Jeffrey M. Elliott, Executive Vice President


                              COLE PARTNERS LLC

                         By:  /s/ Jeffrey M. Elliott
                              ----------------------------------
                              Jeffrey M. Elliott, Executive Vice President


                              IRIDIAN PRIVATE BUSINESS VALUE EQUITY FUND, L.P.
                         By:  COLE PARTNERS LLC

                         By:  /s/ Jeffrey M. Elliott
                              ----------------------------------
                              Jeffrey M. Elliott, Executive Vice President


                              IRIDIAN PARTNERS FUND, L.P.
                         By:  COLE PARTNERS LLC

                         By:  /s/ Jeffrey M. Elliott
                              ----------------------------------
                              Jeffrey M. Elliott, Executive Vice President

                              RENOMA PARTNERS LLC

                         By:  /s/ Jeffrey M. Elliott
                              ----------------------------------
                              Jeffrey M. Elliott, Executive Vice President


                              IRIDIAN CHARTER FUND, LP
                         By:  RENOMA PARTNERS LLC

                         By:  /s/ Jeffrey M. Elliott
                              ----------------------------------
                              Jeffrey M. Elliott, Executive Vice President


                         By:  /s/ David L. Cohen
                              ----------------------------------
                              David L. Cohen, individually


                         By:  /s/ Harold J. Levy
                              ----------------------------------
                              Harold J. Levy, individually