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295450

Sigma-Aldrich

2-Methylpropane

99%

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Synonym(s):
Isobutane
Linear Formula:
(CH3)3CH
CAS Number:
Molecular Weight:
58.12
Beilstein/REAXYS Number:
1730720
EC Number:
MDL number:
UNSPSC Code:
12142100
PubChem Substance ID:
NACRES:
NA.22

vapor density

2.01 (21 °C, vs air)

Quality Level

vapor pressure

72.2 psi ( 37.7 °C)

assay

99%

autoignition temp.

860 °F

expl. lim.

8.3 %

bp

−12 °C (lit.)

mp

−160 °C (lit.)

density

2.064 g/mL at 25 °C (lit.)

SMILES string

CC(C)C

InChI

1S/C4H10/c1-4(2)3/h4H,1-3H3

InChI key

NNPPMTNAJDCUHE-UHFFFAOYSA-N

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Application

2-Methylpropane can be used as a starting material to prepare:
  • Isobutylene by catalytic dehydrogenation using various catalysts.
  • Isopropyl methyl ketone by formylation reaction with carbon monoxide in the presence of super acid catalyst.
  • tert-Butylhydroperoxide (TBHP) by oxidation.

Packaging

Supplied in a Sure/Pac cylinder and has a brass needle valve with a male 1/4" NPTF outlet thread installed. Before using the cylinder, ensure that the valve is closed, then remove the galvanized steel hex cap that seals the outlet valve.

Compatible with the following:

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC
Sure/Pac is a trademark of Sigma-Aldrich Co. LLC

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pictograms

FlameGas cylinder

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hcodes

Hazard Classifications

Flam. Gas 1A - Press. Gas Liquefied gas

wgk_germany

nwg

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ppe

Eyeshields, Faceshields, Gloves, multi-purpose combination respirator cartridge (US)


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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The production and use of butadiene and isobutylene
Petroleum Chemistry (Neftekhimiya), 112(14), 84-84 (2015)
Superacid-Catalyzed Selective Formylation-Rearrangement of Isoalkanes with Carbon Monoxide to Branched Ketones
Olah GA, et al.
Angewandte Chemie (International ed. in English), 112(14), 2647-2648 (2000)
Effect of catalyst prereduction on the dehydrogenation of isobutane over chromia/alumina
Airaksinen S MK and Krause A OI
Industrial & Engineering Chemistry Research, 44(11), 3862-3868 (2005)
Laure Pison et al.
Physical chemistry chemical physics : PCCP, 17(45), 30328-30342 (2015-10-29)
The solubility of n-butane and 2-methylpropane (isobutane) in three ionic liquids - 1-(2-methylpropyl)-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [(2mC3)C1im][Ntf2], 1-(3-methylbutyl)-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [(3mC4)C1im][Ntf2] and 1-methyl-3-pentylimidazolium bis(trifluoromethylsulfonyl)imide [C5C1im][Ntf2] - has been measured at atmospheric pressure from 303 to 343 K. Isobutane is less soluble than n-butane
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PloS one, 9(9), e107363-e107363 (2014-09-17)
Cell loss after transplantation is a major limitation for cell replacement approaches in regenerative medicine. To assess the survival kinetics of induced pluripotent stem cell (iPSC)-derived cardiomyocytes (CM) we generated transgenic murine iPSC lines which, in addition to CM-specific expression

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