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Registry of Toxic Effects of Chemical Substances (RTECS)

Isobutyric acid

RTECS #

NQ4375000

CAS #

79-31-2

Updated

April 2010

Molecular Weight

88.12

Molecular Formula

C4H8O2

Synonyms

2-Methylpropanoic acid
2-Methylpropionic acid
Acetic acid, dimethyl-
alpha-Methylpropionic acid
Dimethylacetic acid
Isopropylformic acid
Kyselina isomaselna (Czech)
Propionic acid, 2-methyl-

Skin and Eye Irritation and References

Route/OrganismDoseEffectReference
skin /rabbit 139 µg/24H open irritation testAIHAAP 23,95,1962

Acute Toxicity Data and References

Route/OrganismDoseEffectReference
oral/rat lethal dose (50 percent kill): 280 µL/kgAIHAAP 23,95,1962
oral/rat lethal dose (50 percent kill): >500 mg/kgHPV357 -,-,2006
skin/rabbit lethal dose (50 percent kill): 500 µL/kgAIHAAP 23,95,1962

Reviews

OrganizationStandardReference
TOXICOLOGY REVIEWAMIHAB 21,100,1960

NIOSH Documentation and Surveillance

OrganizationStandardReference
National Occupational Exposure Survey 1983Hazard Code X4110; Number of Industries 4; Total Number of Facilities 93; Number of Occupations 14; Total Number of Employees Exposed 5052; Total Number of Female Employees Exposed 652

Status in Federal Agencies

OrganizationReference
EPA TSCA Section 8(b) CHEMICAL INVENTORY
EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JANUARY 2001
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