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AdvanSix Methyl Ethyl Ketoxime (MEKO)

Methyl ethyl ketoxime (MEKO) is a high-efficiency anti-skinning agent used for air-drying paints, inks and coatings. It can also be used to improve the shelf life of silicone adhesives and sealants and the functionality of polyurethane coatings. MEKO meets the most stringent standards for low moisture and high assay.

As a safe, cost-effective alternative to MEKO, AdvanSix also offers EZ-Blox®, which provides low risk of exposure and an improved toxicology profile. EZ-Blox® does not require costly reformulation or additional research and development, and independent research shows it is safe as a versatile intermediate for use in Adhesives & Sealants, Automotive & Transportation, Building & Construction, Industrial, Packaging, and Paints & Coatings applications.

Adhesive & Sealants

Construction adhesives and tapes, labels, and graphic art adhesives.

Automotive & Transportation

Exterior and body parts, bonding and assembly sealants.

Building & Construction

Building envelope materials, glazing and window elements, construction sealants and caulks, and other infrastructure applications.


Water treatment applications.


Packaging primer and lacquer coating applications.

Paints & Coatings

Coatings for automotive OEM, commercial vehicles, vehicle refinish, off road, agricultural and construction equipment, rail, mass transit, coil, and metal, as well as architectural coatings, decorative paints and coatings, roof coatings, and concrete coatings.

Chemical NameMethyl Ethyl Ketone Oxime

FunctionIntermediate, Oxygen Scavenger, Corrosion Inhibitor, Blocking Agent, Antioxidant, Anti-Skinning Agent

CAS Number96-29-7

Labeling ClaimsHigh Purity, Low Water Content

Technical Data Sheet

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Identification & Functionality

CASE Ingredients Functions
Fluids & Lubricants Functions
EC No.

Features & Benefits

Applications & Uses

Compatible Polymers & Resins
Compatible Substrates & Surfaces
Fluids & Lubricants Type
Base Chemicals End Uses
Fluids & Lubricants End Use


Physical Form
Clear colorless liquid
Ether-like odor
Slightly Soluble in
Typical Properties
ValueUnitsTest Method / Conditions
CH3CNOHC2H5 Contentmin. 99%-
Colormax. 8APHA-
Methyl Ethyl Ketone Contentmax. 0.50%-
Sec-Butyl Alcohol Contentmax. 0.50%-
Water Contentmax. 0.25%-
Physico-Chemical Properties
ValueUnitsTest Method / Conditions
Boiling Point (1,013 hPa)152 (306)°C (°F)-
Specific Gravity (H₂O = 1.0)0.92g/ml-
Density (at 20°C (68°F))0.92g/cm3-
Flash Point63 (145)°C (°F)-
Melting Point-29.5°C-
Molecular Weight87.12--
pH (at 20°C (68°F))7.0 - 8.5--
Vapor Pressure (at 20°C (68°F))2.66hPa-

Packaging & Availability

Packaging Type