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Styrene is an organic compound consisting of a vinyl group attached to a benzene ring. It is a colorless, oily liquid that may appear yellowish with age and is primarily used in the production of polystyrene plastics and resins.
Production of polystyrene plasticsProduction of resins
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Safety Reference
Flammable
Harmful
Health Hazard
Environmental Hazard
Danger
H226Flammable liquid and vapour
Customs Tariff Classification
The international HS code for STYRENE (CAS 100-42-5) is 2902.50.
HS code (international, 6-digit)
2902.50
EU CN code (8-digit)
2902 50 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
styrene
InChIKey
PPBRXRYQALVLMV-UHFFFAOYSA-N
SMILES
C=CC1=CC=CC=C1
Synonyms (96)
STYRENE
SYN
Annamene
Benzene, (1Z)-ethenyl-2-d-
Benzene, ethenyl-
Benzene, vinyl-
Bulstren K-525-19
COLESTYRAMINE IMPURITY A
Cinnamene
Cinnamenol
Cinnaminol
Cinnamol
Diarex hf 77 (Salt/Mix)
Ethenylbenzene
Ethenylbenzene, 9CI
Ethylene, phenyl-
FEMA No. 3233
FEMA Number 3234
Isotactic polystyrene
MAOMIN SM
Monomer, Styrene
PhCH=CH2
Phenethylene
Phenylethene
Phenylethylene
Phenylethylene, inhibited
Phenylethylene; Vinylbenzene
Poly(Styrene-d8)
Polystyrene
Polystyrene (FG)
Polystyrene, 1000
Polystyrene, M.W. 50,000
Polystyrene, for extrusion
Polystyrene, impact resistive
Polythrene(melt flow rate)
STYRENE-ALPHA,2,3,4,5,6-D6
STYRENE-ALPHA-13C
Stirolo
Stirolo [Italian]
Styreen
Styreen [Dutch]
Styren
Styren [Czech]
Styrene - stabilised with TBC
Styrene monomer
Styrene monomer, inhibited
Styrene, SAJ first grade
Styrol
Styrol [German]
Styrole
Styrolene
Styron
Styron (Salt/Mix)
Styropol (Salt/Mix)
Styropol SO
Styropor
Styropor (Salt/Mix)
TTB 7302
Vinylbenzen
Vinylbenzen [Czech]
Vinylbenzen [Dutch]
Vinylbenzene
Vinylbenzene, inhibited
Vinylbenzol
p-vinyl benzene
trans-Styrene-(beta)-d
H315
Causes skin irritation
H319Causes serious eye irritation
H332Harmful if inhaled
H372Causes damage to organs through prolonged or repeated exposure
H304May be fatal if swallowed and enters airways
H335May cause respiratory irritation
H361Suspected of damaging fertility or the unborn child
H412Harmful to aquatic life with long lasting effects
H413May cause long lasting harmful effects to aquatic life
H401Toxic to aquatic life
H336May cause drowsiness or dizziness
H341Suspected of causing genetic defects
H350May cause cancer
H360May damage fertility or the unborn child
H370Causes damage to organs
H351Suspected of causing cancer
H400Very toxic to aquatic life
H411Toxic to aquatic life with long lasting effects
