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

Tel: (610) 651-4200
Fax: (610) 651-4504
E-mail: Customer Service
E-mail: Technical Service

National Silicates
an affiliate of the PQ Corporation

Toronto, Ontario
429 Kipling Avenue
Etobicoke, ON  M8Z 5C7

Tel: (416) 255-7771
Fax: (416) 201-4343
E-Mail: Customer Service
E-Mail: Technical Service

CUSTOMER SERVICE – INDONESIA

PQ Silicas Indonesia
JL Rembang Industri RAYA N0 24
Jawa Timur
Bangil Pasuruan KM50
67152
Indonesia

Tel: 0062343 740114
Email: Customer Service

CUSTOMER SERVICE – EUROPE
PQ Silicas BV
Ir. Rocourstraat 28
6245 AD Eijsden
The Netherlands

Tel: +31 434099333
Fax:     +31 434094165
Email: Customer Service

CUSTOMER SERVICE – SILICAS
PQ Silicas UK Ltd
4 Liverpool Road, Bank Quay
Warrington
WA5 1AB

Tel: +44 1925416100
Fax:   +44 1925 416116
Email: Customer Service

CUSTOMER SERVICE – SOUTH AFRICA
PQ Silicas South Africa Ltd.
169 Tedstone Road
PO box 14016
Wadeville 1422, Germiston, Gauteng
South Africa

Tel        : +27 11 820 7111
Fax       : +27 11 827 6922

Email: Customer Service