<DOCUMENT>
<TYPE>EX-3.31
<SEQUENCE>10
<FILENAME>p68409exv3w31.txt
<DESCRIPTION>EX-3.31
<TEXT>
<PAGE>

                                                                    EXHIBIT 3.31

                                STATE OF DELAWARE
                            CERTIFICATE OF AMENDMENT
                                       OF
                            CERTIFICATE OF FORMATION

1.       Name of Limited Liability Company: Eagle-Picher Technologies, LLC.

2.       The Certificate of Formation of the limited liability company is hereby
         amended as follows: The name of the company is changed from
         Eagle-Picher Technologies, LLC to EaglePicher Technologies, LLC.

         IN WITNESS WHEREOF, the undersigned have executed this Certificate on
the 1st day of April, A.D. 2003.

                                       By: /s/ Louis E. Lupo
                                           -------------------------------------

                                       Name: Louis E. Lupo
                                       Title: Vice President and General Manager

</TEXT>
</DOCUMENT>