Product name: 2,2,4-Trimethylpentane

English Name: 2,2,4-Trimethylpentane

CAS: 540-84-1

EINECS: 208-759-1

Formula: C8H18

Molecular Weight: 114.23

Structural formula:

Melting Point: -107°C

Boiling Point: 98-99°C(lit.)

Density: 0.692g/mLat25°C(lit.).

Vapor density: 3.9 (vs air).

Vapor pressure: 41mmHg (21°C).

Refractive index: n20/D1.391(lit.).

Flash Point: 18°F

Storage condition: Store at+5°Cto+30°C.

Solubility: water:insoluble

Acidity coefficient (pKa): >14 (Schwarzenbach et al., 1993).

State: Liquid

Color: APHA:≤10

Specific gravity: 0.692 (20/4°C).

Relative polarity: -0.4

Explosive limit: 1% (V).

Odor Threshold: 0.11ppm

WATER SOLUBILITY: INSOLUBLE

Freezing point: -107.52°C

Maximum wavelength (λmax):

L:205nmAmax:1.00

min:225nmAmax:0.10

min:254nmAmax:0.01

Merck 14,5193

BRN 1696876

Henry'sLawConstant: 3.23 at 25 °C (Mackay and Shiu, 1981)

Exposure Limits:

ACGIH TLV: TWA for all isomers 300 ppm (adopted).

Stability: Stable. Highly flammable. Incompatible with oxidizing agents, reducing agents.

LogP: 4.373(est)

Uses

1. It is a standard fuel for measuring the octane number (shock resistance) of gasoline, and is mainly used as an additive for gasoline and aviation gasoline, as well as a non-polar inert solvent in organic synthesis

2. 2,2,4-Trimethylpentane is a reference material for testing the anti-knock performance of gasoline. The octane numbers of 2,2,4-Trimethylpentane and heptane are specified as 100 and 0, respectively. If the anti-knock performance of a gasoline sample in a single-cylinder engine is equivalent to a composition of a 2,2,4-Trimethylpentane-heptane mixture under the specified test conditions, the octane number of the sample is equal to the volume percentage of isoisothane in the standard fuel. Gasoline with good anti-knock performance has a high octane number.

3. Organic synthesis. Solvent. Determination of the octane number of fuel oil. Standards for gas chromatography analysis. Diluent.