Item 5.02 Departure of Directors or Certain Officers; Election of Directors;
Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

(b) On September 17, 2009, American Pacific Corporation (the "Company") announced the retirement of John R. Gibson as Chief Executive Officer of the Company, effective December 31, 2009. Following his retirement, Mr. Gibson will continue to serve as the non-executive Chairman of the Board of Directors of the Company.
(c) On September 17, 2009, the Company announced that effective January 1, 2010, Dr. Joseph Carleone, 63, will succeed Mr. Gibson as Chief Executive Officer of the Company. Dr. Carleone currently serves as the Company's President and Chief Operating Officer and, upon Mr. Gibson's retirement, Dr. Carleone will be President and Chief Executive Officer of the Company.

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