Isobutylene

Agent Name
Isobutylene
Alternative Name
Isobutene
CAS Number
115-11-7
Formula
C4-H8
Major Category
Other Classes
Isobutylene formula graphical representation
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."
Biomedical References

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]
NFPA
burn readily

Adverse Effects

Neurotoxin
Acute solvent syndrome
ACGIH Carcinogen
Not Classifiable
Other Poison
Simple Asphyxiant

Diseases, Processes, and Activities Linked to This Agent

Diseases

Occupational diseases associated with exposure to this agent: