Agent Name | Isobutylene |
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Alternative Name | Isobutene |
CAS Number | 115-11-7 |
Formula | C4-H8 |
Major Category | Other Classes |
Synonyms | 1,1-Dimethylethene; 1,1-Dimethylethylene; 1-Propene, 2-methyl-; 2-Methyl-1-propene; 2-Methylpropene; 2-Methylpropylene; Isobutene; Isopropylidenemethylene; Propene, 2-methyl-; gamma-Butylene; sym-Dimethylethylene; [ChemIDplus] UN1055 |
Category | Aliphatics, Unsaturated |
Description | Colorless liquid or gas with odor of coal gas; [Hawley] Compressed gas with an unpleasant odor; [MSDSonline] Boiling point = -6.9 deg C; [HSDB] |
Sources/Uses | Used to make trimers, polymers, antioxidants (foods, packaging, food supplements, and plastics), high-octane aviation gasoline, tert-butanol methacrylates and other resins; [HSDB] |
Comments | In confined space spill, may displace air and act as simple asphyxiant; Evaporating liquid can cause frostbite; Inhalation of high concentrations can cause CNS depression; [ICSC] May cause irritation; Evaporating liquid can cause frostbite; In confined space spill, may displace air and act as simple asphyxiant; Inhalation of high concentrations can cause CNS depression and anesthesia; [MSDSonline] See "Butene, all isomers." |
Exposure Assessment | |
Skin Designation (ACGIH) | No |
TLV (ACGIH) | 250 ppm |
Lethal Concentration | LC50 (rat) = 620,000 mg/m3/4h |
Explanatory Notes | Flash point = -76 deg C; [Hawley] |
Flammability (NFPA) | |
Adverse Effects | |
Neurotoxin | CNS Solvent Syndrome |
Other Poison | Simple Asphyxiant |
ACGIH Carcinogen | Not Classifiable |
Links to Other NLM Databases | |
Health Studies | Human Health Effects from Hazardous Substances Data Bank: |
Toxicity Information | |
Chemical Information | |
Related Information in HazMap | |
Diseases | Occupational diseases associated with exposure to this agent: |