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Key Documents

360597

Sigma-Aldrich

2,2,4-Trimethylpentane

ACS reagent, ≥99.0%

Synonym(s):

Isooctane

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About This Item

Linear Formula:
(CH3)2CHCH2C(CH3)3
CAS Number:
Molecular Weight:
114.23
Beilstein:
1696876
EC Number:
MDL number:
UNSPSC Code:
12191502
PubChem Substance ID:
NACRES:
NA.21
grade:
ACS reagent
bp:
98-99 °C (lit.)
vapor pressure:
41 mmHg ( 21 °C)

grade

ACS reagent

Quality Level

vapor density

3.9 (vs air)

vapor pressure

41 mmHg ( 21 °C)

Assay

≥99.0%

form

liquid

autoignition temp.

745 °F

expl. lim.

6 %

dilution

(for analytical testing)

impurities

≤0.0003 meq/g Water-soluble titr. acid
≤0.005% S compounds

evapn. residue

≤0.001%

color

APHA: ≤10

refractive index

n20/D 1.391 (lit.)

bp

98-99 °C (lit.)

mp

−107 °C (lit.)

solubility

water: insoluble

density

0.692 g/mL at 25 °C (lit.)

SMILES string

CC(C)CC(C)(C)C

InChI

1S/C8H18/c1-7(2)6-8(3,4)5/h7H,6H2,1-5H3

InChI key

NHTMVDHEPJAVLT-UHFFFAOYSA-N

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General description

2,2,4-Trimethylpentane (TMP, isooctane), a volatile organic solvent is used to improve the octane rating of combustion fuels. TMP is a primary reference fuel with an arbitrary octane number of 100 as it burns smoothly without resulting in any knocking. It also a component of gasoline. The physical characteristics of the binary mixtures of n-heptane and 2,2,4-trimethylpentane has been studied that helps in understanding the combustion process of mixtures of primary reference fuels.

Application

2,2,4-Trimethylpentane (TMP, isooctane) may be used in the following studies:
  • Synthesis of polyethyleneimine /silica hybrid nanoparticles.
  • Amino acid quantification process.
  • To dissolve di(2-ethylhexyl) phosphoric acid(DEHPA) to form a solution that is used in the extraction and back extraction of methylene blue.

Signal Word

Danger

Hazard Classifications

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

Target Organs

Central nervous system

Storage Class Code

3 - Flammable liquids

WGK

WGK 2

Flash Point(F)

10.4 °F - closed cup

Flash Point(C)

-12 °C - closed cup


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