Styrene / C₈H₈


Gas Identification

Other denomination
Phenylethylene, Vinylbenzene, Cinnamene, Styrol
CAS Registry Number
SCBA type

Chemical properties

Molecular formula
Molecular mass
104,1 g/mol

Physical properties

Boiling point
145,14 °C
Autoignition temperature
490 °C
Gas/Vapour density
8,4 eV

Flammability limit

0,9 % v/v
6,8 % v/v

Threshold limit value

23,3 ppm • 100 mg/m³
46,6 ppm • 200 mg/m³

Styrene : Description and use


Styrene is an aromatic organic compound. It is used to manufacture plastics, most notably polystyrene. It is naturally present in small quantities in some plants and can be industrially obtained from oil.
Low concentrations of styrene can be found in fruit, vegetables and meat but also in cigarette smoke.
Styrene is an oily, colourless chemical compound which is both toxic and flammable.

  • Polystyrenes
  • Copolymers: acrylonitrile butadiene styrene (ABS), styrene acrylonitrile (SAN), methyl methacrylate butadiene styrene (MBS)
  • Styrene-butadiene synthetic rubbers (SBR)
  • Unsaturated polyesters and reinforced unsaturated polyesters (for example in glass fibres or in GRPs)

Styrene : Warnings and caution

GHS hazard statements

H226 - Flammable liquid and vapour.
H332 - Harmful if inhaled.
H319 - Causes serious eye irritation.
H315 - Causes skin irritation.
H361d - Suspected of damaging the unborn child
H372 - Causes serious damage to organs (hearing system)

GHS precautionary statements

P210 - Keep away from heat.
P302 + P352 - IF ON SKIN: Wash with plenty of soap and water.
P305 + P351 + P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P314 - Get medical advice/attention if you feel unwell.

SGH02 : Inflammable
SGH08 : Sensibilisant, mutagène, cancérogène, reprotoxique
SGH07 : Toxique, irritant, sensibilisant, narcotique