Methyl Ethyl Ketone
CAS 78-93-3 · C4H8O
Hazard classDanger — Flammable, Irritant / harmful
PictogramsFlammableIrritant / harmful
H-statements- H225 Highly flammable liquid and vapour
- H336 May cause drowsiness or dizziness
- H319 Causes serious eye irritation
- EUH066 Repeated exposure may cause skin dryness or cracking
Common uses (US EPA CDR)SolventCleaning agentSurface modifierCBIAdhesion/cohesion promoterIntermediate
Workplace exposure limitsNIOSH REL TWA 200 ppm (590 mg/m3) ST 300 ppm (885 mg/m3)
OSHA PEL TWA 200 ppm (590 mg/m3)
IDLH 3000 ppmOccupational exposure limits — NIOSH Pocket Guide.
Synonyms2-Butanone · METHYL ETHYL KETONE · Butan-2-one · Butanone · 78-93-3 · Ethyl methyl ketone · Methylethyl ketone · Meetco
Molecular weight72.11 g/mol
Data sourceHarmonised classification ECHA — EU CLP Annex VILegally binding EU classification adopted by ECHA under CLP Annex VI — the highest-confidence GHS source.
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