N-Methylmorpholine N-oxide (more correctly 4-methylmorpholine 4-oxide), NMO or NMMO is an organic compound. This heterocyclic amine oxide and morpholine derivative is used in organic chemistry as a co-oxidant and sacrificial catalyst in oxidation reactions for instance in osmium tetroxide oxidations and the Sharpless asymmetric dihydroxylation or oxidations with TPAP. NMO is commercially supplied both as a monohydrate C5H11NO2·H2O and as the anhydrous compound. The monohydrate is used as a solvent for cellulose in the Lyocell process to produce cellulose fibers.

CAS：7529-22-8
中文别名：4-甲基吗啉-N-氧化物;N-甲基氧化吗啉;N-甲基吗啉-N-氧化物;4-甲基吗啡-N-氧化物;N-甲基吗啉氧化物;
英文别名：4-Methylmorpholine N-Oxide;4-Methylmorpholine 4-oxide;
分子式：C5H11NO2
分子量：117.146
精确质量：117.079
Psa：38.66
Logp：-0.0802

MDL号：MFCD00005947

外观与性状：无色至略黄色透明液体
密度：1.14 g/cm3
沸点：118-119ºC
熔点：180-184ºC
闪点：118-119ºC
折射率：n20/D 1.43
稳定性：Stable at room temperature in closed containers under normal storage and handling conditions.
储存条件：Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Refrigerator (approx 4ºC). Store protected from moisture.

安全说明：S26-S36/37
危险类别码：R36/37/38
WGK Germany：1
海关编码：2934999090
危险品标志：Xi
危险性描述：H315; H319; H335
信号词：Warning
危险性防范说明：P261; P305 + P351 + P338
危险标志：GHS07