Melting point :−39 °C(lit.)
Boiling point :163 °C(lit.)
Density :1.013 g/mL at 25 °C(lit.)
refractive index :n20/D 1.423(lit.)
Flash point :150 °F
storage temp. :2-8°C
solubility :Fully miscible.
pka :4.34(at 25℃)
form :Liquid
color :Clear colorless to yellow
BRN :1699159
Stability :Light Sensitive
InChI :InChI=1S/C4H6O2/c1-2-3-4(5)6/h2H,1,3H2,(H,5,6)
InChIKey :PVEOYINWKBTPIZ-UHFFFAOYSA-N
SMILES :C(O)(=O)CC=C
CAS DataBase Reference :625-38-7(CAS DataBase Reference)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501 H351 Suspected of causing cancer Carcinogenicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501 H412 Harmful to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 3 P273, P501
Precautionary statements:	P202 Do not handle until all safety precautions have been read and understood. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.