Industrial chemicals · Taylor, TXCertificate of Analysis

Sample Certificate of Analysis

Methyl Ethyl Ketone (MEK)

Certificate #: TYP-METHYLETHYLK
Lot Number: TYPICAL SAMPLE
Test Date: 2026-06-02
Category: Hydrocarbon & Oxygenated Solvents (A)
CAS Number: 78-93-3
Formula: C4H8O
Computed Assay: 100.00%(100 − Σ impurities)

Sample COA. Lot-specific COAs ship with each order.

Specifications

Parameter	Specification	Typical Result	Test Method
Assay (GC-FID)	99.5 – 100.5 %	100 %	GC-FID
Acidity (as acetic)	≤ 0.02 %	0.001 %	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	4 APHA	ASTM D1209
Distillation Range	79 – 80.5 °C	79.75 °C	ASTM D1078
Specific Gravity @20°C	0.804 – 0.807 g/mL	0.805 g/mL	Hydrometer @ 25°C
Water (Karl Fischer)	≤ 0.1 %	0.01 %	ASTM E203 / ISO 6296

Generated 2026-06-02. Values are representative of typical production lots and reflect the published specification range. Lot-specific COAs are provided with every shipment.