Corporate Headquarters
Malvern, PA
300 Lindenwood Drive
Valleybrooke Corporate Center
Malvern, PA 19355-1740
Mailing Address:
PQ Corporation
P.O. Box 840
Valley Forge, PA
19482-0840
Tel1: (610) 651-4200
Fax: (610) 651-4504
E-mail: Customer Service
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