First Quarter 2007 Westlake Chemical Corporation Earnings Conference Call

First Quarter 2007 Westlake Chemical Corporation Earnings Conference Call

HOUSTON, April 18 /PRNewswire-FirstCall/ -- Westlake Chemical Corporation (NYSE: WLK) will release its 2007 first quarter earnings prior to the market opening on Thursday, May 3, 2007. The company will host a conference call at 11:00 a.m. Eastern Time (10:00 a.m. Central Time) on the same day to discuss the earnings release.

To access the conference call, dial (800) 688-0836, or (617) 614-4072 for international callers, approximately 10 minutes prior to the scheduled start time and reference passcode 73021925.

The conference call will also be available via webcast at http://phx.corporate-ir.net/phoenix.zhtml?p=irol- eventDetails&c=180248&eventID=1533849 and the earnings release can be obtained via the company's Web page at, http://www.westlake.com/investors.html.

This call will be available for replay beginning an hour after the call has ended, and may be accessed until 1:00 p.m. Eastern Time on May 10, 2007. The replay can be accessed by calling the following numbers: Domestic callers should dial 1-888-286-8010 and international callers may access the replay at 617-801-6888. The access code at both numbers is 48629607.

Westlake Chemical Corporation is a manufacturer and supplier of petrochemicals, polymers and fabricated products with headquarters in Houston, Texas. The company's range of products includes: ethylene, polyethylene, styrene, propylene, caustic, VCM, PVC and PVC pipe, windows and fence. For more information, visit the company's Web site at http://www.westlake.com .

Investor Contact
Steve Bender, 713-960-9111
sbender@westlake.com

Media Contact
David Hansen, 713-960-9111
dhansen@westlake.com

CONTACT: Investors, Steve Bender, sbender@westlake.com ,or Media, David Hansen, dhansen@westlake.com , both of Westlake Chemical Corporation, +1-713-960-9111

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