Industrial chemicals · Taylor, TXTechnical Data Sheet
Methyl Ethyl Ketone (MEK) ACS Grade
ACS Grade
Identity & Composition
- Product Name
- Methyl Ethyl Ketone (MEK) ACS Grade
- Alliance Code
- methyl-ethyl-ketone-mek-acs-grade
- Grade
- ACS Grade
- Concentration
- —
- CAS Number
- 78-93-3PubChem
- Formula
- C4H8OPubChem
- Molecular Weight
- 72.11PubChem
- Product Type
- pure_substance
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (C4H8O) | 99.0 % min | 99.9 % | Gas chromatography (GC) | ACS Reagent Chemicals |
| Titrable acid | 0.0005 meq/g max | 0.0001 meq/g | — | ACS Reagent Chemicals |
| Residue after evaporation | 0.0025 % max | 0.0004 % | — | ACS Reagent Chemicals |
| Water (H2O) | 0.20 % max | 0.03 % | — | ACS Reagent Chemicals |
| Substances darkened by sulfuric acid | Passes test | Passes test | ACS monograph colorimetric test | Interpreted |
| Identification (Infrared spectrum) | Conforms to structure | Passes test | FTIR vs. reference spectrum | Interpreted |
Specification values are guaranteed limits. Typical values are representative of production lots and are not guaranteed. Lot-specific certificates of analysis ship with every order.
Available GradesSame CAS, alternate grades and concentrations
| Grade | Concentration | Typical Assay | SKU | TDS |
|---|---|---|---|---|
| This grade ACS Grade | — | — | current | current |
| Technical | — | — | methyl-ethyl-ketone-mek | 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.
| Property | Value | Source |
|---|---|---|
| Form | Liquid | Published reference |
| Color | 15 max | ACS Reagent Chemicals |
| Odor | Acetone-like odor | Published reference |
| Specific Gravity (20 °C) | 0.804 - 0.807 | Interpreted |
| Density | 0.806 at 68 °F (USCG, 1999) - Less dense than water; will float | Published reference |
| Boiling Point | 175.3 °F at 760 mmHg (NTP, 1992) | Published reference |
| Melting Point | -123.3 °F (NTP, 1992) | Published reference |
| Flash Point | 26 °F (NTP, 1992) | Published reference |
| Vapor Pressure | 77.5 mmHg at 68 °F ; 100 mmHg at 77.0 °F (NTP, 1992) | Published reference |
| Solubility (water) | greater than or equal to 100 mg/mL at 66 °F (NTP, 1992) | Published reference |
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN119349 CFR 172.101
- Hazard Class
- 3Adjudicated
- Packing Group
- IIAdjudicated
- Proper Shipping Name
- Ethyl methyl ketone or methyl ethyl 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
- —no canonical
- 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) ACS Grade. 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.
Applications
- ACS reagent grade material for high-purity laboratory applicationslabdepotinc.com
- Used widely as a solventlabdepotinc.com
- Solvent for natural and synthetic resins, giving solutions with low viscosity and high solids contentwurthmachinery.com
Applications are drawn from published manufacturer and supplier documentation; each is sourced. Suitability for a specific use is the buyer's to confirm.
Storage & Handling
- Recommended Storage
- Cool, dry, well-ventilated area in original sealed containers. Refer to product SDS for material-specific guidance.Class-level guidance — not product-specific; the SDS controls.
- Handling Precautions
- Use standard chemical PPE — splash goggles, gloves, lab coat. Refer to SDS for hazard-specific PPE requirements.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Consult the SDS for material-specific incompatibilities.Class-level guidance — not product-specific; the SDS controls.
- Shelf Life
- 12 monthswurthmachinery.comProvided proper storage and handling precautions are taken
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 or methyl ethyl ketone, 3, PG II
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-06-18 by Andre Taki, DOT Hazmat Specialist.
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.2 | 2026-07-22 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-06-18 | Canonical data re-verified: 3 fields updated against independent vendor SDSs, CLP Annex VI, 49 CFR, and OSHA HazCom 2024 (GHS classification, hazard/precautionary codes, signal word, physical properties as applicable).
| canonical_change |
| 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.