Melting point :-78 °C (lit.)
Boiling point :37-38 °C (lit.)
Density :0.667 g/mL at 25 °C (lit.)
vapor pressure :7.88 psi ( 20 °C)
refractive index :n20/D 1.374(lit.)
Flash point :<−30 °F
storage temp. :2-8°C
solubility :Chloroform (Slightly), Methanol (Slightly)
form :Liquid
color :Clear colorless
PH :7.51 at 24.8℃ and 10g/L
Water Solubility :Miscible with chloroform, benzene and toluene. Immiscible with water.
BRN :1697100
Stability :Stable, but highly flammable. Readily forms explosive mixtures with air. Note low flash point.
CAS DataBase Reference :917-92-0(CAS DataBase Reference)
NIST Chemistry Reference :1-Butyne, 3,3-dimethyl-(917-92-0)

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 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. P233 Keep container tightly closed. P240 Ground/bond container and receiving equipment. P241 Use explosion-proof electrical/ventilating/lighting/…/equipment. P242 Use only non-sparking tools. P273 Avoid release to the environment.