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59070

Sigma-Aldrich

2-Methylbutane

puriss. p.a., ≥99.5% (GC)

Synonym(s):

Isopentane

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About This Item

Linear Formula:
CH3CH2CH(CH3)2
CAS Number:
Molecular Weight:
72.15
Beilstein:
1730723
EC Number:
MDL number:
UNSPSC Code:
12191502
PubChem Substance ID:
NACRES:
NA.07

vapor density

2.6 (vs air)

Quality Level

vapor pressure

11.17 psi ( 20 °C)

grade

puriss. p.a.

Assay

≥99.5% (GC)

form

liquid

autoignition temp.

788 °F

expl. lim.

8.3 %

impurities

≤0.05% water

evapn. residue

≤0.001%

refractive index

n20/D 1.354 (lit.)
n20/D 1.354

bp

30 °C (lit.)

mp

-160 °C

density

0.62 g/mL at 25 °C (lit.)

cation traces

Al: ≤0.5 mg/kg
Ba: ≤0.1 mg/kg
Bi: ≤0.1 mg/kg
Ca: ≤0.5 mg/kg
Cd: ≤0.05 mg/kg
Co: ≤0.02 mg/kg
Cr: ≤0.02 mg/kg
Cu: ≤0.02 mg/kg
Fe: ≤0.1 mg/kg
K: ≤0.5 mg/kg
Li: ≤0.1 mg/kg
Mg: ≤0.1 mg/kg
Mn: ≤0.02 mg/kg
Mo: ≤0.1 mg/kg
Na: ≤0.5 mg/kg
Ni: ≤0.02 mg/kg
Pb: ≤0.1 mg/kg
Sr: ≤0.1 mg/kg
Zn: ≤0.1 mg/kg

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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General description

2-Methylbutane (Isopentane) is a branched chain alkane. It undergoes bromination at 75°C to afford 2-bromo-2-methyl butane. Its Raman spectra in vapor and solid phases at low temperatures (-196°C) have been investigated.

Application

2-Methylbutane may be used in the following studies:
  • As starting reagent for the synthesis of isoprene.
  • Preparation of C5 and C6 alkyl nitrates.

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

Target Organs

Central nervous system

Supplementary Hazards

Storage Class Code

3 - Flammable liquids

WGK

WGK 2

Flash Point(F)

-59.8 °F - closed cup

Flash Point(C)

-51 °C - closed cup


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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Johnson AW.
Invitation to Organic Chemistry., 50-54 (1999)
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)
Formation of alkyl nitrates from the reaction of branched and cyclic alkyl peroxy radicals with NO.
Atkinson R, et al.
International Journal of Chemical Kinetics, 16(9), 1085-1101 (1984)

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