1-Bromo-2-methylpropane

Synonym(s):1-Bromo-2-methylpropane;Isobutyl bromide;iso-Butyl bromide

CAS NO.：78-77-3
Empirical Formula: C4H9Br
Molecular Weight: 137.02
MDL number: MFCD00000217
EINECS: 201-141-2
SAFETY DATA SHEET (SDS)
Update Date: 2025-01-27 09:38:02

What is 1-Bromo-2-methylpropane?

Chemical properties

CLEAR LIQUID

The Uses of 1-Bromo-2-methylpropane

1-Bromo-2-methylpropane is used as a synthetic reagent for the preparation of 1-ethyl-1,3-isobutylimidazolium bromide by reaction with 1-ethylimidazole.

What are the applications of Application

1-Bromo-2-methylpropane is a synthesis reagent for 1-ethyl-1,3-isobutylimidazolium bromide

Safety Profile

Questionable carcinogen with experimental neoplastigenic data. Moderately toxic by intraperitoneal route. A dangerous fire hazard when exposed to heat or flame. When heated to decomposition it emits toxic fumes of Br-. See also BROMIDES.

Purification Methods

Partially hydrolyse it to remove any tertiary alkyl halide, then fractionally distil it, then wash it with conc H2SO4, water and aqueous K2CO3, then redistil it from dry K2CO3. [Dunbar & Hammett J Am Chem Soc 72 109 1950, Beilstein 1 IV 294.]

Properties of 1-Bromo-2-methylpropane

Melting point:	-119 °C
Boiling point:	90-92 °C(lit.)
Density	1.26 g/mL at 20 °C(lit.)
vapor pressure	41 hPa (20 °C)
refractive index	n20/D 1.435(lit.)
Flash point:	65 °F
storage temp.	Store below +30°C.
solubility	0.51g/l slightly soluble
form	Liquid
color	Clear colorless
Water Solubility	0.51 g/L (18 ºC)
Merck	14,5135
BRN	1730915
Dielectric constant	4.0（-7℃）
Stability:	Volatile
CAS DataBase Reference	78-77-3(CAS DataBase Reference)
NIST Chemistry Reference	Propane, 1-bromo-2-methyl-(78-77-3)
EPA Substance Registry System	Propane, 1-bromo-2-methyl- (78-77-3)

Safety information for 1-Bromo-2-methylpropane

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02
GHS Hazard Statements	H225:Flammable liquids
Precautionary Statement Codes	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. P243:Take precautionary measures against static discharge.