Styrene Cas 100-42-5

CAS Number

100-42-5

Molecular Formula

C8H8

Also known as:

Styrene; Vinylbenzene; Phenylethene; Ethenylbenzene; Styrol;

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Product Description

Product introduction

Styrene (vinylbenzene; CAS 100-42-5) is a volatile, flammable aromatic monomer supplied commercially in polymer-grade and technical grades. It is the primary monomer for manufacturing polystyrene, styrene-acrylonitrile (SAN), acrylonitrile-butadiene-styrene (ABS), styrene-butadiene rubber (SBR) and is used as the reactive diluent in unsaturated polyester resins (UPR), gelcoats and a range of thermoset and coating chemistries. Product is offered in stabilized formulations (with polymerization inhibitors) and inhibitor-free grades for immediate polymerisation feed; request lot-specific Certificate of Analysis (CoA) and Safety Data Sheet (SDS) prior to qualification.

Applications & Descriptions

  • Polystyrene Production
    Styrene is polymerized (bulk, suspension or solution) to produce polystyrene and its modified grades used in packaging, insulation, consumer goods and engineering applications.

  • ABS / SAN Copolymer Manufacture
    Used as the styrenic component in ABS and SAN copolymers to balance toughness, impact resistance and surface aesthetics for automotive, appliance and electronic housings.

  • Unsaturated Polyester Resins (UPR) & Gelcoats
    Acts as the reactive diluent and crosslinking monomer for unsaturated polyester resins and gelcoats in composites, marine coatings and castings; participates in free-radical curing to form the thermoset network.

  • Styrene-Butadiene Rubber (SBR) & Latex
    Employed in emulsion and solution polymerizations to produce SBR latices and elastomers for tires, footwear and industrial goods where styrenic content tailors physical properties.

  • Coatings, Adhesives & Inks (Reactive/ Solvent Uses)
    Used as a reactive solvent or monomer in specialty coatings, inks and adhesive formulations where styrenic polymerisation is integrated into the cured matrix.

  • Chemical Intermediate & Specialty Monomer Uses
    Feedstock for alkylation, copolymerizations and functional monomer syntheses; used for production of ethylbenzene (via hydrogenation reversal), and in downstream chemistry following regulatory and safety controls.

Technical Parameters

Parameter Value
Melting point -31 °C
Boiling point 145-146 °C
Density 0.906 g/mL at 25 °C
Vapor density 3.6 (vs air)
vapor pressure 12.4 mm Hg ( 37.7 °C)
Fp 88 °F
Storage temp Store at <= 20°C.
Specific Gravity 0.909

Quick Information

EINECS 202-851-5
Molecular Weight 104.15 g/mol

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