2,3-Dimethylpentane
- CAS NO.：565-59-3
- Empirical Formula: C7H16
- Molecular Weight: 100.2
- MDL number: MFCD00009337
- EINECS: 209-280-0
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:19:02
What is 2,3-Dimethylpentane?
Chemical properties
clear colorless liquid
Physical properties
Clear, colorless, flammable liquid with an odor resembling hexane. An odor threshold concentration of 4.5 ppmv was reported by Nagata and Takeuchi (1990).
The Uses of 2,3-Dimethylpentane
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.
Properties of 2,3-Dimethylpentane
| 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 | n |
| 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 information for 2,3-Dimethylpentane
| Signal word | Danger |
| Pictogram(s) |
 Flame Flammables GHS02  Exclamation Mark Irritant GHS07  Health Hazard GHS08  Environment GHS09 |
| GHS Hazard Statements |
H225:Flammable liquids H304:Aspiration hazard H315:Skin corrosion/irritation H336:Specific target organ toxicity,single exposure; Narcotic effects H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233:Keep container tightly closed. P273:Avoid release to the environment. P331:Do NOT induce vomiting. P301+P310:IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. |
Computed Descriptors for 2,3-Dimethylpentane
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