Agent Name

Isopentane

CAS Number

78-78-4

Formula

C5-H12

Major Category

Solvents

Synonyms

1,1,2-Trimethylethane; 2-Methylbutane; Butane, 2-methyl-; Dimethylethylmethane; Ethyldimethylmethane; Isoamylhydride; Isopentane; [ChemIDplus]

Category

Aliphatics, Saturated (<C12)

Description

Colorless liquid with a pleasant, gasoline-like odor; [HSDB]

Sources/Uses

Used as a chemical intermediate, a blowing agent for polystyrene, a gasoline additive, and an anesthetic; [HSDB]

Comments

CNS depression is observed in mice exposed for 5-60 minutes at concentrations of 90,000-120,000 ppm (9-12% by volume); Concentrations of 150,000-170,000 ppm are lethal for dogs. [HSDB] See "n-Pentane."

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data

TLV (ACGIH)

1000 ppm

PEL (OSHA)

1000 ppm

MAK

1000 ppm

Vapor Pressure

689 mm Hg

Odor Threshold Low

400 ppm

Lethal Concentration

LCLo (mice) = 419,000 mg/m3/2H

Explanatory Notes

Odor threshold from ACGIH; MP = -159.9 degrees C; BP = 27.8 degrees C;

Flammability (NFPA)

4: Burns readily

Adverse Effects
Neurotoxin

CNS Solvent Syndrome

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: