α-methylstyrene

Also known as: 1-methyl-1-phenyl-ethylene, 1-methyl-1-phenylethene, 2-Phenyl-1-propene, 2-Phenyl-2-propene, 2-Phenylpropene, 2-Phenylpropylene, 2-methyl-2-phenylethene, 2-phenyl-1-propen, A-METHYL STYRENE, AMS, Benzene, (1-methylethenyl)-, Benzene, isopropenyl-, EINECS 202-705-0, Isopropenylbenzene, MFCD00008859, Prop-1-en-2-ylbenzene, Styrene, α-methyl-, UNII-D46R9753IK, α-Methylstyrene, α-methyl styrene

α-methylstyrene (CAS 98-83-9) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C9H10 and a molecular weight of 118.176 g/mol. Key properties include a melting point of −24 °C(lit.), a boiling point of 162.5±7.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 45.6±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H226 — Flammable liquid and vapour, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

98-83-9

Jingsj CID

J-330-6

Molecular Formula

C₉H₁₀

Molecular Weight

118.176 g/mol

Category

Aromatic Hydrocarbons

Last updated

8/21/2026