Melting point :-158 °C (lit.)
Boiling point :56 °C (lit.)
Density :0.68 g/mL at 25 °C (lit.)
vapor pressure :412 mm Hg ( 37.7 °C)
refractive index :n20/D 1.389(lit.)
Flash point :−1 °F
storage temp. :Flammables area
solubility :0.079g/l
form :Oil
color :Clear Colourless
explosive limit :1.2%(V)
Water Solubility :<0.1 g/L (20 ºC)
BRN :505982
CAS DataBase Reference :563-78-0(CAS DataBase Reference)
NIST Chemistry Reference :1-Butene, 2,3-dimethyl-(563-78-0)
EPA Substance Registry System :1-Butene, 2,3-dimethyl- (563-78-0)

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 H304 May be fatal if swallowed and enters airways Aspiration hazard Category 1 Danger
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.