PQ Corporation is a privately held, international company that was established in 1831 in Philadelphia, Pennsylvania. It has produced soluble silicates since 1861, operating until 1978 under the name Philadelphia Quartz Company. Today PQ is recognized as a world leader in silica-derived products and technology.

Its mission is four-fold:

• PQ is pledged to provide products and services that satisfy customer needs in its chosen markets by operating a growing, profitable business.
• PQ is committed to the continuous improvement of its current businesses and the development of unique new products and services.
• PQ differentiates itself by offering products of the highest quality and by providing excellent customer service and technical support that satisfy customers' needs and contribute to the success of their businesses.
• As a result, PQ creates value for its customers, employees and owners and has earned the regard of its suppliers and of the communities in which it operates.

PQ specializes in the manufacture of inorganic industrial chemicals and glass-bead products, products that essentially are derived from sand. Its major product lines include:

• sodium and potassium silicates
• hollow microspheres
• detergent and catalyst zeolites
• solid glass spheres
• magnesium sulfate
• silica adsorbents and catalysts
• aluminum sulfate
• precipitated silica

Worldwide, PQ and its affiliated companies operate 69 chemical and glass-bead plants in 18 countries on five continents-North America, South America, Europe, Asia and Australia. Together they employ 1600 people worldwide. PQ's corporate headquarters are located in Valley Forge, Pennsylvania. The current sales of PQ and its affiliated companies exceed $500 million annually.

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