Isopropenylbenzene 2-Phenyl-1-propene (1-Methylethenyl)benzene
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α-Methylstyrene (AMS) is a chemical intermediate used in the manufacture of plasticizers, resins and polymers. It is a co-product formed in a variation of the cumene process. The homopolymer obtained from this monomer, poly(α-methylstyrene), is unstable, being characterized by a low ceiling temperature.
Names
IUPAC name
Isopropenylbenzene
Other names
α-Methylstyrene; 2-Phenyl-1-propene; 1-Methyl-1-phenylethylene; 2-Phenylpropene; (1-Methylethenyl)benzene; beta-Phenylpropene; 2-Phenylpropylene; beta-Phenylpropylene; alpha-Methylstyrol; 1-Phenyl-1-methylethylene; 2-Phenyl-2-propene
Identifiers
AbbreviationsAMS
CAS Registry Number:98-83-9
Properties
Molecular formula:C9H10
Molar mass:118.18 g·mol−1
Appearance:Colorless liquid
Density:0.91 g/cm3
Melting point:−24 °C (−11 °F; 249 K)
Boiling point:165 °C (329 °F; 438 K)
Solubility in waterInsoluble
Vapor pressure:2 mmHg (20°C)
Flash point:45 °C (113 °F; 318 K)
Explosive limits:1.9%-6.1%
LD50 (Median lethal dose)4900 mg/kg (oral, rat)
US health exposure limits (NIOSH):
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