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Sigma-Aldrich

2-Methylbutane

anhydrous, ≥99%

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Synonym(s):
Isopentane
Linear Formula:
CH3CH2CH(CH3)2
CAS Number:
78-78-4
Molecular Weight:
72.15
Beilstein:
1730723
EC Number:
201-142-8
MDL number:
MFCD00009338
UNSPSC Code:
12352001
PubChem Substance ID:
57648270
NACRES:
NA.21

grade

anhydrous

Quality Level

100

vapor density

2.6 (vs air)

vapor pressure

11.17 psi ( 20 °C)

Assay

≥99%

form

liquid

autoignition temp.

788 °F

expl. lim.

8.3 %

impurities

<0.001% water
<0.005% water (100 mL pkg)

evapn. residue

<0.0003%

refractive index

n20/D 1.354 (lit.)

bp

30 °C (lit.)

mp

-160 °C

density

0.62 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

CCC(C)C

InChI

1S/C5H12/c1-4-5(2)3/h5H,4H2,1-3H3

InChI key

QWTDNUCVQCZILF-UHFFFAOYSA-N

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Application

2-Methylbutane undergoes catalytic dehydrogenation in the presence of chromia-alumina catalyst to form isoamylenes, which can undergo further dehydrogenation to form isoprene. It may also be used as a solvent in the preparation of trans-Bis(triethylphosphine) (hydroxy carbonyl) (phenyl) platinum(II), a metallacarboxylic acid.

Signal Word

Danger

Hazard Statements

H224,H304,H336,H411

Hazard Classifications

Aquatic Chronic 2 - Asp. Tox. 1 - Flam. Liq. 1 - STOT SE 3

Target Organs

Central nervous system

Supplementary Hazards

EUH066

WGK

WGK 2

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

危险化学品

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Power efficient synthesis of isoprene via two-stage dehydrogenation of isopentane
Karimov OK &amp; Daminev RR
World Applied Sciences Journal , 24(3), 320-325 (2013)
Johnson AW.
Invitation to Organic Chemistry., 338-338 (1999)
Rotational Isomerism and Thermodynamic Functions of 2-Methylbutane and 2, 3-Dimethylbutane. Vapor Heat Capacity and Heat of Vaporization of 2-Methylbutane.
Scott DW, et al.
Journal of the American Chemical Society, 73(4), 1707-1712 (1951)
Eagleson M.
Concise Encyclopedia Chemistry, 560-560 (1994)
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