- Methylethyl ketone oxime
Methylethyl ketone oxime Properties Molecular formula C4H9NO Appearance colourless liquid Density 0.923 g/cm3 Melting point
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Methylethyl ketone oxime is the organic compound with the formula C2H5C(NOH)CH3. This colourless liquid is the oxime derivative of methyl ethyl ketone. MEKO, as it is called in the paint industry, is used to suppress "skinning" of paints: the formation of a skin on paint before it is used. MEKO functions by binding the drying agents, metal salts that catalyze the oxidative crosslinking of drying oils. Once the paint is applied to a surface, MEKO evaporates, thereby allowing the drying process to proceed. Other antiskinning agents have been used, including phenol-based antioxidants, but these tend to yellow the paint.
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