Industrial chemicals · Taylor, TXCertificate of Analysis
Sample Certificate of Analysis
Methyl Ethyl Ketone (MEK)
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Sample COA. Lot-specific COAs ship with each order.
Last reviewed 2026-05-20.
COA · Answer summary
Typical certificate of analysis for Methyl Ethyl Ketone (MEK). Lot-specific results ship with every order.
- Assay (computed)
- 99.90%
Specifications
| Parameter | Specification | Typical Result | Test Method |
|---|---|---|---|
| Assay (GC-FID) | 99.5 – 99.9 % | 99.9 % | GC-FID |
| Acidity (as acetic) | ≤ 0.003 % | 0.002 % | Titration per ACS/USP |
| Acidity (as acetic) | ≤ 30 ppm | 20 ppm | Titration |
| Aldehydes | ≤ 0.1 % | 0.01 % | Per specification |
| Appearance/Odor | — | — | Visual Inspection |
| Color (APHA) | ≤ 10 APHA | 5 APHA | ASTM D1209 |
| Distillation Range | 78.5 – 81 °C | — | ASTM D1078 |
| Refractive Index @20°C | 1.378 – 1.38 | 1.379 | Refractometer @ 20°C |
| Specific Gravity @20°C | 0.804 – 0.806 g/mL | 0.805 g/mL | Hydrometer @ 25°C |
| Water (Karl Fischer) | ≤ 0.05 % | 0.02 % | ASTM E203 / ISO 6296 |
Generated . Published by Alliance Chemical from first-party canonical product data. Our authority is hands-on chemical handling, DOT/GHS-compliant shipping, and government-registered distribution — not bench chemistry. Values are representative of typical production lots and reflect the published specification range. Lot-specific COAs are provided with every shipment.