CAS No. 140-88-5

Purity≥ wt%	99.5
Acidity≤ wt%	0.01
Color≤ Hazen	20
Water≤ wt%	0.1
Inhibitor(MEHQ) mg/kg	15±5

Molecular Formula: C5H8O2
Molecular Weight: 100.12
Hazard Symbols: F,Xn
UN Number: UN 1917 3/PG 2
WGKGermany: 2
PackingGroup: II
HS Code: 2916 12 00

mp −71 °C(lit.)
bp 99 °C(lit.)
density 0.921 g/mL at 20 °C
vapor density 3.5 (vs air)
vapor pressure 31 mm Hg ( 20 °C)
FEMA 2418
refractive index n20/D 1.406(lit.)
Fp 60 °F
storage temp. Refrigerator
Water Solubility 1.5 g/100 mL (25 ºC)
FreezingPoint 99.8℃
Merck 14,3759
BRN 773866
Chemical Properties colourless liquid
General Description A clear colorless liquid with an acrid odor.
Flash point 60°F. May polymerize exothermically if heated or contaminated.
If the polymerization takes place inside a container, the container may rupture violently.
Auto ignition temperature 721°F (383°C) (NTP). Less dense than water. Vapors heavier than air. Used to make paints and plastics.
Air & Water Reactions Highly flammable. Insoluble in water.