Methyl Ethyl Ketone

Methyl Ethyl Ketone (MEK) is a clear, highly flammable solvent with a sharp, sweet odor. Commonly used in coatings, adhesives, and chemical intermediates, MEK is known for its fast evaporation and strong solvency. It poses health risks through inhalation and prolonged exposure.

CAS No: 78-93-3

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Formula

C₄H₈O

Main Uses

Coatings, Adhesives, Chemical Synthesis

Appearance

Clear, Colorless Liquid

Handling

Highly Flammable – Handle with Extreme Care

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Safety Highlights

MEK is classified as a hazardous chemical under OSHA and GHS guidelines. It is volatile, flammable, and may affect the central nervous system (CNS) on short-term exposure. Long-term exposure can harm liver and kidney function. Always ensure adequate ventilation and personal protection.

Flammable Liquid

Flash point -7°C. Vapors form explosive mixtures. Keep away from flames, sparks, and hot surfaces.

Toxic on Contact

Inhalation can cause dizziness, drowsiness, headache, and nausea. High exposure may result in unconsciousness.

Corrosive Agent

Causes serious eye irritation. Repeated exposure can dry or crack the skin.

Emergency Measures

Use dry chemical, CO₂, or foam for fire suppression. Do not use water jet. Move affected person to fresh air.

Proper Storage

Store in a cool, well-ventilated, flameproof area. Keep containers tightly sealed and grounded.

Regulatory ID

UN No: UN1193 | DOT Hazard Class: 3 (Flammable) | Packing Group: II

Environmental Care

MEK is volatile and may impact aquatic life if released. Avoid discharge into drains or soil.

PPE Required

Use chemical splash goggles, flame-resistant gloves, protective clothing, and respirator with organic vapor cartridges.

Frequently Asked Questions

Highly effective yet highly flammable, MEK is widely used in paints, adhesives, and resins. This guide provides quick, essential answers for anyone working with or storing MEK.

What is Methyl Ethyl Ketone used for?

MEK is primarily used as an industrial solvent in paints, coatings, resins, adhesives, and inks due to its fast evaporation and powerful solvency.

Is MEK hazardous to health?

Yes. Inhalation can affect the CNS, while long-term exposure may harm kidneys and liver. It also causes serious eye irritation.

How flammable is MEK?

Extremely. It has a flash point of -7°C and forms explosive vapor-air mixtures. Static discharge and open flames must be strictly avoided.

What PPE is required while handling MEK?

Always use protective goggles, chemical-resistant gloves, full-coverage clothing, and a respirator in poorly ventilated areas.

Is MEK environmentally safe?

MEK is biodegradable but volatile. It can cause environmental harm if improperly released. Spills should be contained and cleaned immediately.

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