American Pacific Announces Corporate Governance Changes

At its regularly scheduled meeting on September 14, 2010, the Board of Directors of American Pacific Corporation

took the actions summarized below: Recommended that shareholders at the next Annual Meeting amend AMPAC's Certificate of Incorporation to replace the 80% vote requirement for director election with a simple majority vote requirement. Amended the By-Laws to move the advance notice requirements for shareholder proposals and nominations for the Board of Directors 30 days closer to the date of each Annual Meeting. Suspended the effectiveness of the Company's Shareholder Rights Plan.