2,3-Dimethylpentane Property

Melting point:

-107.55°C (estimate)

Boiling point:

89-90 °C (lit.)

Density 

0.695 g/mL at 25 °C (lit.)

vapor density 

3.45 (vs air)

vapor pressure 

2.35 psi ( 37.7 °C)

refractive index 

n20/D 1.392(lit.)

Flash point:

20 °F

storage temp. 

Flammables area

solubility 

Soluble in acetone, alcohol, benzene, chloroform, and ether (Weast, 1986)

form 

Liquid

pka

>14 (Schwarzenbach et al., 1993)

color 

Colorless to Almost colorless

Odor Threshold

4.5ppm

explosive limit

~7%

Water Solubility 

Insoluble in water.

BRN 

1718734

Henry's Law Constant

1.72(atm?m³/mol) at 25 °C (Mackay and Shiu, 1981)

Exposure limits

ACGIH: TWA 400 ppm; STEL 500 ppm

Dielectric constant

1.9399999999999999

CAS DataBase Reference

565-59-3(CAS DataBase Reference)

EPA Substance Registry System

2,3-Dimethylpentane (565-59-3)

Safety

Hazard Codes 

N-Xn-F,N,Xn,F

Risk Statements 

36/37/38-67-65-50/53-38-11

Safety Statements 

16-26-36/37/39-61-9

RIDADR 

UN 3295 3/PG 2

WGK Germany 

3

RTECS 

SA0428000

Autoignition Temperature

639 °F

TSCA 

Yes

HazardClass 

3

PackingGroup 

II

HS Code 

29011000

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H225Highly Flammable liquid and vapour

H304May be fatal if swallowed and enters airways

H315Causes skin irritation

H336May cause drowsiness or dizziness

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P233Keep container tightly closed.

P273Avoid release to the environment.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P331Do NOT induce vomiting.

2,3-Dimethylpentane Chemical Properties,Usage,Production

Chemical Properties

clear colorless liquid

Physical properties

Clear, colorless, flammable liquid with an odor resembling hexane. An odor threshold concentration of 4.5 ppm_v was reported by Nagata and Takeuchi (1990).

Uses

It is used in the liquid-phase oxidation of 2,4-dimethylpentane and in a study on the preparation and the physical constants of a number of alkanes and cycloalkanes.

General Description

2,3-Dimethylpentane belongs to the class of volatile organic compounds (VOCs).

Source

In diesel engine exhaust at a concentration of 0.9% of emitted hydrocarbons (quoted, Verschueren, 1983). Schauer et al. (1999) reported 2,3-dimethylpentane in a diesel-powered medium-duty truck exhaust at an emission rate of 720 μg/km.
California Phase II reformulated gasoline contained 2,3-dimethylpentane at a concentration of 29.4 g/kg. Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without catalytic converters were 5.34 and 714 mg/km, respectively (Schauer et al., 2002).

Environmental Fate

Photolytic. A photooxidation rate constant of 3.4 x 10^-12 cm³/molecule?sec was reported for the gas-phase reaction of 2,3-dimethylpentane and OH radicals (Atkinson, 1990).
Chemical/Physical. Complete combustion in air yields carbon dioxide and water vapor. 2,3- Dimethylpentane will not hydrolyze because it has no hydrolyzable functional group.