Melting point :-24.1°C (estimate)
Boiling point :126-127 °C (lit.)
Density :0.892 g/mL at 25 °C (lit.)
refractive index :n20/D 1.438(lit.)
Flash point :99 °F
storage temp. :Flammables area
solubility :Miscible with chloroform and ethyl acetate.
form :Liquid
pka :14.29±0.20(Predicted)
Specific Gravity :0.892
color :Clear colorless to pale yellow
BRN :1734245
InChI :1S/C5H8O/c1-3-4-5(2)6/h1,5-6H,4H2,2H3
InChIKey :JTHLRRZARWSHBE-UHFFFAOYSA-N
SMILES :CC(O)CC#C
CAS DataBase Reference :2117-11-5(CAS DataBase Reference)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. P240 Ground/bond container and receiving equipment. P241 Use explosion-proof electrical/ventilating/lighting/…/equipment. 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.