Methyl Ethyl Ketone 99.5% (MEK)

Methyl Ethyl Ketone 99.5% (MEK) (CAS 78-93-3, molecular formula C4H8O) is a workhorse solvent across coatings, cleaning and process manufacture, valued for its predictable evaporation behaviour and consistent purity from batch to batch. China Chemicals supplies it at 99.5% min in pack sizes from 1 L through to 200 L Drum, so laboratory trial quantities and full production volumes can be sourced from the same specification.

It is also traded as MEK, Butanone, 2-Butanone, Ethyl Methyl Ketone. Every consignment ships with a batch-specific Certificate of Analysis and the current Safety Data Sheet, and material is stored and picked under stock rotation so you receive product well inside its shelf life.

Typical applications

High-solids coating and vinyl adhesive formulation
PVC pipe cement and plastic welding
Dewaxing of lubricating oils
Magnetic tape and film coating manufacture
Printing ink solvent requiring fast release

Technical specification

Chemical name	Methyl Ethyl Ketone 99.5% (MEK)
Synonyms	MEK, Butanone, 2-Butanone, Ethyl Methyl Ketone
CAS number	78-93-3
Molecular formula	C4H8O
Appearance	Clear colourless liquid
Purity	99.5% min
Water	0.1% max
Acidity as acetic acid	0.005% max
Evaporation residue	0.002% max
Density at 20°C	0.803 – 0.806 g/cm³
Boiling point	79.6°C

Values above are typical and are confirmed on the Certificate of Analysis issued against each batch. Tighter specifications can be quoted where a process requires them.

Packaging and supply

Available in 1 L, 5 L, 25 L, 200 L Drum. Bulk, road tanker and export drum quantities are quoted on request, including FOB and CIF terms for international shipment. Pricing shown is per pack in USD, exclusive of freight and any applicable duties.

Handling and safety

Transport classification: UN1193 · Flammable Liquid, Class 3. Store in the original closed container in a cool, well-ventilated area away from incompatible materials, and handle using appropriate personal protective equipment. Read the Safety Data Sheet in full before use — it is issued with every order and is available on request before purchase.

Supply to industry only. Products are sold for legitimate industrial, laboratory and manufacturing use. We may request end-use details and business registration before releasing an order.