Home › Chemicals › Polystyrene CAS 9003-53-6: Polystyrene ((C8H8)n) Identity CAS Number 9003-53-6 Molecular Formula (C8H8)n IUPAC Name poly(1-phenylethylene) Molecular Weight 104.15 g/mol SMILES C=CC1=CC=CC=C1Synonyms PS, general-purpose polystyrene, GPPS, crystal polystyrene
2D Structure
Physical Properties Density 1.05 g/mL at 25°C Boiling Point None°C Melting Point 240.0°C Flash Point 345.0°C Vapor Pressure 0.0 kPa at 20°C Refractive Index nD = 1.592 Dielectric Constant ε = 2.5
Safety & GHS Classification
Storage: Store in cool, dry place away from organic solvents (polystyrene dissolves in many solvents). Flammable — burns readily with sooty smoke. Not UV stable without additives.
Material Compatibility Matrix Plastics Material Rating PTFE Excellent PVC Poor PE Poor PP Fair PEEK Excellent PVDF Good
Rubbers Material Rating Viton Severe Effect NBR Severe Effect EPDM Severe Effect Silicone Severe Effect FKM Severe Effect
Metals Material Rating Stainless 316 Excellent Aluminum Excellent Copper Excellent Brass Excellent
Applications Food packaging (clamshell containers) Disposable cups and cutlery CD and DVD cases Insulation foam (EPS, XPS) Consumer electronics housings Toys and model kits Laboratory ware (Petri dishes, test tubes) Building insulation panels External References: PubChem
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