UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(D) OF THE
SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): December 20, 2005

AMERICAN PACIFIC CORPORATION

(Exact name of Registrant as Specified in its Charter)

Delaware	1-8137	59-6490478
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)
3770 Howard Hughes Parkway, Suite 300, Las Vegas, Nevada		89109
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s telephone number, including area code: (702) 735-2200

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

1

Item 2.02 Results of Operations and Financial Condition.

     On December 20, 2005, the Registrant issued a press release relating to the Registrant’s earnings for the fourth quarter and fiscal year ended September 30, 2005. A copy of the press release is attached as Exhibit 99.1.

     The information in this report (including Exhibit 99.1) is being furnished pursuant to Item 2.02 and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed to be incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act.

Item 9.01 Financial Statements and Exhibits.

     (c) Exhibits.

     99.1 Press release of American Pacific Corporation, dated December 20, 2005.

2

SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	American Pacific Corporation
Date: December 20, 2005	By:	/s/ Seth Van Voorhees
		Seth Van Voorhees
		Vice President, Chief Financial Officer and Treasurer

3