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.

CAS：96-29-7
中文别名：乙基甲基酮肟;甲乙酮肟;2-丁酮肟;甲基乙基酮肟;
英文别名：2-Butanone, oxime;2-Butanone oxime;
分子式：C4H9NO
分子量：87.1204
精确质量：87.0684
Psa：32.59
Logp：1.2465

MDL号：MFCD00013935

外观与性状：透明液体
密度：0.924g/mLat 25°C(lit.)
沸点：59-60°C15mm Hg(lit.)
熔点：-30 °C
闪点：140°F
折射率：n20/D 1.442(lit.)
水溶解性：114 g/L (20 ºC)
稳定性：Stable. Combustible. Incompatible with strong oxidizing agents. May react with strong acids to form an explosive material.
储存条件：Store in a cool, dry place. Keep container closed when not in use.
蒸汽密度：3 (vs air)
蒸汽压：<8 mm Hg ( 20 °C)

RTECS号：EL9275000
安全说明：S13-S23-S26-S36/37/39-S61-S45-S36/37-S25
危险类别码：R21; R40; R41; R43
WGK Germany：1
危险品运输编码：UN 1993 3/PG 3
海关编码：29280090
危险类别：3
包装等级：III
危险品标志：Xn