Polystyrene

CAS Number
9003-53-6
EC Number
500-008-9
Chemical Formula
(C8H8)x
Molecular Weight
104.15 g/mol
Abbreviation
PS

Description

Polystyrene (CAS 9003-53-6), commonly abbreviated as PS, is a synthetic thermoplastic polymer produced from styrene monomer and used across packaging, construction, and electronics manufacturing. It provides rigidity, dimensional stability, and ease of processing in both solid and foam forms. In packaging, PS is thermoformed into food containers, disposable cutlery, and protective inserts.

These applications require clarity and stiffness at a low cost. Expanded polystyrene foam serves as structural insulation board in building panels and cavity wall systems, delivering thermal resistance without weight. In electronics, PS is injection-molded into housings, connectors, and display components. These parts rely on tight dimensional tolerances and excellent electrical insulation properties for long-term performance.

The printing industry uses PS sheet stock as a substrate for signage, point-of-sale displays, and screen-printed graphics. Polystyrene is supplied as pellets or granules for injection molding and extrusion. It is also available as expandable beads for foam processing. Standard commercial grades include general-purpose PS (GPPS) for transparent applications and high-impact PS (HIPS) for toughened, opaque end uses.

Food-contact grades compliant with FDA and EU regulations are available for packaging applications. Our material meets rigorous industrial specifications to ensure consistency across various manufacturing batches.

Other Names (Synonyms)

PS plastic|poly(1-phenylethylene)|Benzene, ethenyl-, homopolymer|Styrene, polymers|Lustrex|Polystyrol F|Styrene Polymer|GPPS (General Purpose)|PS|E183

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Melting Point 240 °C
Boiling Point 154 °C @ Press: 7 Torr
Density 1.04-1.13 g/cm³
Flash Point >230 °F
Appearance white powder or beads, or clear solid
Color White
Form powder
Water Solubility insoluble
Refractive Index n 20/D 1.5916

Trade & Regulatory

HS Code 39039000
Storage Class 11 - Combustible Solids
WGK (Germany) 3

Documentation

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