Industrial chemicals · Taylor, TXTechnical Data SheetTechnical Data Sheet
Methyl Ethyl Ketone (MEK)
1. Identity & Composition
- Product Name
- Methyl Ethyl Ketone (MEK)
- Alliance Code
- methyl-ethyl-ketone-mek
- Grade
- —
- Concentration
- —
- CAS Number
- 78-93-3PubChem
- Formula
- C4H8OPubChem
- Molecular Weight
- 72.11PubChem
- Product Type
- pure_substance
Available GradesSame CAS, alternate grades and concentrations
| Grade | Concentration | Typical Assay | SKU | TDS |
|---|---|---|---|---|
| This grade — | — | — | current | current |
| ACS Grade | — | — | methyl-ethyl-ketone-mek-acs-grade | View TDS → |
Typical assay shown is the rolling-window mean from the sibling product's most recent lots. Grade selection drives downstream end-use — verify the sibling grade matches your specification before substitution.
Physical & Chemical Properties
One or more physical-property values are temporarily suppressed pending verification against vendor COA data. For complete properties refer to the Safety Data Sheet (SDS) or contact sales@alliancechemical.com.
- Form
- LiquidProduct record
- Odor
- Acetone-like odorProduct record
- Density
- 0.806 at 68 °F (USCG, 1999) - Less dense than water; will floatProduct record
- Boiling Point
- 175.3 °F at 760 mmHg (NTP, 1992)Product record
- Melting Point
- -123.3 °F (NTP, 1992)Product record
- Flash Point
- 26 °F (NTP, 1992)Product record
- Vapor Pressure
- 77.5 mmHg at 68 °F ; 100 mmHg at 77.0 °F (NTP, 1992)Product record
- Solubility (water)
- greater than or equal to 100 mg/mL at 66 °F (NTP, 1992)Product record
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN1193Vendor Label
- Hazard Class
- 3Adjudicated
- Packing Group
- IIAdjudicated
- Proper Shipping Name
- Ethyl methyl ketoneAdjudicated
GHS / OSHA HazCom 2012
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H225, H319, H336, EUH066ECHA CLP Annex VI
- P-Codes (Precautionary Statements)
- P210, P233, P240, P241, P242, P243, P261, P264, P271, P280, P303+P361+P353, P304+P340, P305+P351+P338, P312, P337+P313, P370+P378, P403+P233, P403+P235, P405, P501ECHA CLP Annex VI
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- 200 ppm TWAOSHA 29 CFR 1910.1000
- ACGIH TLV
- —unknown
- NIOSH REL
- 200 ppm TWA / 300 ppm STELNIOSH Pocket Guide
- NIOSH IDLH
- 3000 ppmNIOSH Pocket Guide
Transport descriptions reflect 49 CFR 172.101 lookup at time of publication. Sourced data: ECHA CLP Annex VI for harmonised classifications, NIOSH Pocket Guide for REL/IDLH, OSHA Z-Tables for PEL. Always verify against the latest regulatory text before shipment-critical decisions.
Supplier Qualification Packet
One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Methyl Ethyl Ketone (MEK). Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Catalog EquivalentsCross-reference vs major chemical suppliers
Sigma-Aldrich
| SKU | Grade | Conc. | Match | Notes |
|---|---|---|---|---|
| 360473 | ACS Reagent | 99% | Exact | ACS Reagent ≥99% |
Cross-references are informational. Confirm against the manufacturer's current specification before substitution. Competitor trademarks are property of their respective owners.
Application Guidance
Methyl Ethyl Ketone (MEK) application guidance is available on request. Contact Alliance Chemical Technical Services for grade-specific use recommendations.
Storage & Handling
- Recommended Storage
- Cool, dry, well-ventilated area in original sealed containers. Refer to product SDS for material-specific guidance.
- Handling Precautions
- Use standard chemical PPE — splash goggles, gloves, lab coat. Refer to SDS for hazard-specific PPE requirements.
- Incompatibilities
- Consult the SDS for material-specific incompatibilities.
- Shelf Life
- 24 months from date of manufacture in sealed, original packaging
For full hazard, PPE, and emergency response guidance, refer to the Safety Data Sheet (SDS) for this product. The SDS controls in all cases where guidance differs.
Packaging & Logistics
Shipping Description (US DOT)
UN1193, Ethyl methyl ketone, 3, PG II
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-05-20 by Hossein Taki, Vice President (Vice President, Alliance Chemical · CAGE Code 1LT50 · DOT Hazmat Registrant #2188383).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.0 | 2026-05-20 | Initial URL-first TDS published from canonical chemistry registry. | initial |
This Technical Data Sheet is provided for technical reference. The Safety Data Sheet (SDS) controls in all cases where guidance differs. Values reflect Alliance Chemical canonical data at time of generation; subsequent revisions are recorded in the Revision History above.