Molekula
Methyl Ethyl Ketone (MEK) (2-Butanone) SG
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Methyl Ethyl Ketone (MEK), or 2-Butanone (CAS 78-93-3), is a colorless, volatile solvent widely used in industrial coatings, adhesives, and as a cleaning agent for electronics and metal parts. It is also employed in the production of plastics, textiles, and pharmaceuticals. This chemical has a molecular formula of C4H8O and a molecular weight of 72.11 g/mol. Store at ambient temperatures. The substance carries a **Danger** signal word due to its flammability and potential health hazards. Molekula supplies Methyl Ethyl Ketone from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 L — £38.70 per pack ex VAT · £46.44 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Clear and colourless |
| Density | 0.8035 - 0.80602 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | -6 °C |
| Transport Class | 3 |
| Packing Group | II |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless liquid |
| Odour | Acetone-like odor |
| Melting Point | -86.67 °C |
| Boiling Point | 79.59 °C |
| Density | 0.8 (relative, water = 1) |
| Water Solubility | 223 g/L at 25 °C |
| Solubility (other solvents) | Soluble in benzene, alcohol, and ether; miscible with oils |
| Vapour Pressure | 10.5 kPa at 20 °C |
| Refractive Index | 1.3788 |
| pKa | pKa = 14.70 |
| log P (octanol/water) | 0.29 |
Source: PubChem CID 6569 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 39693881 |
| CAS Number | 78-93-3 |
| IUPAC Name | butan-2-one |
| EC Number | 201-159-0 |
| Molecular Formula | C2H5COCH3 |
| Molecular Weight | 72.11 |
| Exact Mass | 72.0575 |
| SMILES | CCC(=O)C |
| InChIKey | ZWEHNKRNPOVVGH-UHFFFAOYSA-N |
| InChI | InChI=1S/C4H8O/c1-3-4(2)5/h3H2,1-2H3 |
| PubChem CID | 6569 |
| UN Number | UN1193 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2914.12.0000 |
| Tariff Code | 2914120000 |
Safety & GHS
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Flammable
GHS02
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Health Hazard
GHS07
Hazard statements
- EUH066 Repeated exposure may cause skin dryness or cracking
- H225 Highly flammable liquid and vapour
- H303 May be harmful if swallowed
- H319 Causes serious eye irritation
- H336 May cause drowsiness or dizziness
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- 2-Butanone
- 3-Butanone
- Aethylmethylketon
- Butan-2-one
- Butanone
- Ethyl methyl ketone
- Ethylmethylketon
- Meetco
- Methyl acetone
- METHYL ETHYL KETONE
Frequently asked questions
What is Methyl Ethyl Ketone (MEK) commonly used for?
MEK is widely used as a solvent in industrial and consumer products, including paints, coatings, adhesives, and cleaning agents, as well as in the production of plastics and pharmaceuticals.
What is the chemical formula and molecular weight of MEK?
The chemical formula for MEK is **C₄H₈O**, and its molecular weight is **72.11 g/mol**.
How should MEK be stored?
MEK should be stored in a tightly sealed container at **ambient temperature**, away from ignition sources, oxidizing agents, and direct sunlight.
What grades of MEK does Molekula supply?
Molekula supplies **industrial-grade MEK**, meeting standard purity requirements for solvent applications (typically ≥99%).
Can Molekula supply MEK in bulk quantities?
Yes, Molekula can supply MEK in **bulk quantities**, including drums (200L), IBCs (1000L), and tanker loads, depending on customer requirements.
What documentation comes with a MEK order?
Each MEK order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, and **Packing List** for compliance and safety.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.