Agent Name

Methyl isopropenyl ketone

CAS Number

814-78-8

Formula

C5-H8-O

Major Category

Plastics & Rubber

Synonyms

2-Methyl-1-buten-3-one; 2-Methyl-1-butene-3-one; 3-Buten-2-one, 3-methyl-; 3-Butene-2-one, 3-methyl; 3-Methyl-3-buten-2-on [German]; 3-Methyl-3-buten-2-one; 3-Methyl-3-butene-2-one; 3-Methylene-2-butanone; Isopropenyl methyl ketone; Ketone, methyl isopropenyl; Methyl butenone; Methyl isopropenyl ketone; Propen-2-yl methyl ketone; [ChemIDplus] UN1246

Category

Other Monomers

Description

Clear liquid with pleasant odor; [Hawley]

Sources/Uses

Used to make plastics; [HSDB]

Comments

Highly toxic by inhalation, skin absorption, and ingestion; A skin, eye, and respiratory tract irritant; Strong lachrymator; [HSDB] Readily polymerizes; Explosive in air at 1.8-9.0%; [Hawley]

Exposure Assessment
Vapor Pressure

42 mm Hg

Lethal Concentration

LCLo (rat) = 125 ppm/4h

Explanatory Notes

Flash point = 9 deg C; [HSDB]

Flammability (NFPA)

3: May ignite at ambient temperature

Adverse Effects
Lacrimator

Yes

Links to Other NLM Databases
Health Studies

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Toxicity Information

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