SDS Vault Safety Data Sheet Reference

Methyl Ethyl Ketone (MEK)

CAS: 78-93-3 Category: Solvents ⚠ DANGER
Also known as: MEK, 2-Butanone, Ethyl methyl ketone, Butanone

Quick Facts

CAS Number78-93-3
Signal WordDANGER
GHS Hazard Classesflammable, harmful
NFPA RatingHealth: 1 / Flammability: 3 / Reactivity: 0
Common NamesMEK, 2-Butanone, Ethyl methyl ketone, Butanone
PubChem CID6569

Hazard Summary

⚠ DANGER: Fast-evaporating ketone solvent. Flash point −9 °C (16 °F). Highly flammable vapours can form explosive mixtures. Potentiates the neurotoxicity of n-hexane.

GHS Hazard Pictograms

🔥 Flammable ⚠ Harmful/Irritant

Hazard Statements (H-codes)

H225 – Highly flammable liquid and vapour
H319 – Causes serious eye irritation
H336 – May cause drowsiness or dizziness

Precautionary Statements (P-codes)

P210 – Keep away from heat/sparks/open flames
P260 – Do not breathe vapours
P312 – Call Poison Control if unwell

First Aid Measures (Section 4)

👁 Eye Contact
Flush eyes with water for 15 minutes. Seek medical attention if irritation persists.
🖐 Skin Contact
Wash with soap and water. Remove contaminated clothing. Causes defatting with prolonged contact.
🫁 Inhalation
Move to fresh air. High concentrations cause CNS depression — seek medical attention if dizzy or unconscious.
🫦 Ingestion
Do NOT induce vomiting. Rinse mouth. Call Poison Control (1-800-222-1222).

Storage & Handling

🔒 Storage & Handling: Flammable storage cabinet, away from heat and oxidizers. Bond and ground metal containers when transferring.

PPE Requirements

Chemical splash goggles
Nitrile gloves
Organic vapour respirator in poorly ventilated spaces
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