LAS VEGAS, May 5, 2011 /PRNewswire/ — American Pacific
Corporation (Nasdaq: APFC) (“AMPAC”) announced today
that it will release its Fiscal 2011 second quarter financial
results on Thursday, May 12, 2011, immediately after the market
closes. Joseph Carleone, President and Chief Executive Officer and
Dana Kelley, Vice President, Chief Financial Officer and Treasurer,
will host a related investor teleconference/webcast at 1:30 p.m.
Pacific Time.

Callers may listen to the live presentation, which will be
followed by a question and answer session, by dialing (866)
270-6057; passcode #50924981.  An audio webcast of the call
will be available on AMPAC’s website at www.apfc.com, on the
‘Webcasts and Presentations’ page of the ‘Investors’ section.
 Institutional investors can access the call via CCBN’s
password-protected event management site, StreetEvents (www.streetevents.com).
 For those who cannot participate during the call, a replay of
the teleconference will be available for one week after the call,
by dialing (888) 286-8010, passcode #36177239. Additionally the
webcast will remain available for replay on our website through
July 2011.  

ABOUT AMERICAN PACIFIC CORPORATION

American Pacific Corporation (AMPAC) is a leading custom
manufacturer of fine chemicals, specialty chemicals and propulsion
products within its focused markets.  We supply active
pharmaceutical ingredients and advanced intermediates to the
pharmaceutical industry.  For the aerospace and defense
industry we provide specialty chemicals used in solid rocket motors
for space launch and military missiles.  AMPAC also designs
and manufactures liquid propulsion systems, valves and structures
for space and missile defense applications.  We produce clean
agent chemicals for the fire protection industry, as well as
electro-chemical equ

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