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Properties & Specifications – Alpha Methylstyrene
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Properties and Specification Documents
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Alpha Methylstyrene
Physical and Chemical Properties
CAS Number:
98-83-9
Chemical Formula:
C
6
H
5
C(CH
3
)CH
2
Other/Generic Names:
Alpha-methylstyrene, AMS, isopropenyl benzene
Appearance:
Clear water white liquid
Physical State:
Liquid
Molecular Weight:
118.2
Odor:
Pungent, Aromatic
Density at 50°C, 122°F:
7.39 lb/US gal
Specific Gravity (20°C/68°F):
0.91
Vapor Density (Air = 1.0):
4.1
Viscosity of Liquid at 45°C:
0.078 cP
Viscosity of Liquid at 60°C:
0.0762 cP
Viscosity of Liquid at 80°C:
0.0738 cP
Water Solubility (miscibility):
Negligible
Explosive Limits (by volume in air):
Lower: 1.9% Upper: 6.1%
Reactivity:
Yes
Flash Point Closed cup:
53.9°C (129°F)
Refractive Index at 20°C:
1.5386
Autoignition Temperature:
573.9°C (1065°F)
Boiling Point (760 mm):
165.1°C (329.2°F)
Freezing Point:
9.8 °C (49.6 °F)
Color:
Colorless
Product Specifications
Property
Specification
Test Method
Appearance
Clear water white liquid
Visual
Color, APHA
20 Max
D1209
Specific Gravity 15.5°C
0.912 - 0.915
D268
Specific Gravity 25°C
0.903 - 0.908
D268
Purity, Wt. %
99.3 Min
D6144
Phenol Content, ppm
20 Max
D3160
Inhibitor Content (p-TBC), ppm
10-20
D6144
Honeywell MSDS
