Melting point :-1.5°C
alpha :0°(c=1, CHCl3)
Boiling point :66-67 °C/150 mmHg (lit.)
Density :0.894 g/mL at 25 °C (lit.)
vapor pressure :11hPa at 20℃
refractive index :n20/D 1.426(lit.)
Flash point :78 °F
storage temp. :Flammables area
Water Solubility :Completely miscible in water
pka :13.28±0.20(Predicted)
form :Liquid
color :Clear colorless to light yellow
Specific Gravity :0.894
BRN :635722
LogP :1.1 at 35℃
CAS DataBase Reference :2028-63-9(CAS DataBase Reference)
NIST Chemistry Reference :3-Butyn-2-ol(2028-63-9)
EPA Substance Registry System :3-Butyn-2-ol (2028-63-9)

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 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310 H412 Harmful to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 3 P273, P501
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. 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.