Boiling point :85 °C(lit.)
Density :0.87 g/mL at 25 °C(lit.)
refractive index :n20/D 1.406(lit.)
Flash point :28 °F
storage temp. :0-6°C
form :Liquid
Specific Gravity :0.870
color :Clear yellow to orange-brown
Water Solubility :It is soluble in water.
BRN :605353
CAS DataBase Reference :1423-60-5(CAS DataBase Reference)
NIST Chemistry Reference :3-Butyn-2-one(1423-60-5)
EPA Substance Registry System :3-Butyn-2-one (1423-60-5)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501 H300 Fatal if swallowed Acute toxicity,oral Category 1, 2 Danger P264, P270, P301+P310, P321, P330,P405, P501 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. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.