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Chemical Sampling Information (CSI)
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General Description

Synonyms: 1,1-Dimethylethene; 1,1-Dimethylethylene; gamma-Butylene; Isobutene; Isopropylidenemethylene; 2-Methylpropene; 2-Methyl-1-propene; 2-Methylpropylene

OSHA IMIS Code Number: M250

Chemical Abstracts Service (CAS) Registry Number: 115-11-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: UD0890000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1055 115

Chemical Description and Physical Properties:

colorless gas
molecular weight: 56.108
vapor pressure: 268.8 kPa @ (20°C)
molecular formula: C4H8
boiling point: -7.0°C (19.4°F)

Incompatibilities: Forms explosive mixtures with air and oxidizing agents - flammable

Health Factors

Potential Symptoms: Mucous membrane irritation; drowsiness; headache; dizziness; excitation; excess salivation; vomiting; unconsciousness; liquid form may cause frostbite

Affected Organs: Mucous membranes

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