Crystal Polystyrene (GPPS) is noted for its sparkling clarity, hardness, ease of processing, and excellent colorability. Crystal polystyrene and its sibling, High Impact Polystyrene, are available in a wide range of grades for injection molding and extrusion applications. They serve as the basis for food containers, disposable cups, plates, cutlery, CD boxes, and refrigerator liners.

Polystyrene
API II	390 General Purpose, crystal PS
API II	395 High Flow, crystal PS
API II	505, intermediate impact PS
API II	505-HF High Flow, intermediate impact PS
API II	545 High Heat, high impact PS
API II	645-21, super high impact PS
Total	500, crystal PS
Chevron Phillips	KR03NW, SB copolymer

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