isopentane

CAS No. 78-78-4

Formula: C5H12
Basic Info

Isopentane, C5H12, also called methylbutane or 2-methylbutane, is a branched-chain alkane with five carbon atoms. Isopentane is an extremely volatile and extremely flammable liquid at room temperature and pressure. The normal boiling point is just a few degrees above room temperature and isopentane will readily boil and evaporate away on a warm day. Isopentane is commonly used in conjunction with liquid nitrogen to achieve a liquid bath temperature of −160°C. It is 1% or less of natural gas.

Formula
C5H12
Molecular Weight
72.1488
Exact Mass
72.0939
LogP
2.0524
PSA
0
Synonyms

Isopentan

2-Methylbutane

Butane, 2-methyl-

Isoamylhydride

iso-pentane

iso-C5H12

2-methyl-butane

methylbutane

ISOPROPENTANE

2-methyl-butan

JJDW

1,1-dimethylpropane

expand collapse

Properties
Appearance & Physical State
colourless liquid with a characteristic smell
Density
0.62
Boiling Point
30ºC
Melting Point
-160ºC
Flash Point
-51ºC
Refractive Index
1.353-1.55
Stability
Stable. Extremely flammable. Incompatible with strong oxidizing agents. Vapour-air mixtures explosive in certain proportions. Incompatible with rubber, various plastics. The vapour, being heavier than air, may roll over surfaces and collect in low points.
Storage Condition
2-8ºC
Vapor Density
2.6 (vs air)
Vapor Pressure
11.17 psi ( 20 °C)
Safety Info
RTECS
EK4430000
Safety Statements
S9-S16-S29-S33-S61-S62
WGK Germany
2
Risk Statements
R12; R51/53; R65; R66; R67
HS Code
2901100000
RIDADR
UN 1265
Hazard Class
3
Packing Group
I
Caution Statement
P210; P261; P273; P301 + P310; P331
Hazard Codes
Hazard Declaration
Spectrum
NMR Spectrum 1H NMR : 90 MHz in CDCl3
expand collapse
IR Spectrum IR : liquid film
expand collapse
Mass Spectrum Mass spectrum (electron ionization)
expand collapse

Related Compound Information

PRODUCTS
Coming Soon
SUPPLIERS
Coming Soon
BRANDING
Coming Soon