Monomethylhydrazine (MMH) is a volatile hydrazine chemical with the chemical formula CH3 (NH)NH2. It is used as a rocket propellant in bipropellant rocket engines because it is hypergolic with various oxidizers such as nitrogen tetroxide (N2O4) and nitric acid (HNO3). As a propellant, it is described in specification MIL-PRF-27404.

CAS：60-34-4
中文别名：一甲肼;
英文别名：HydraZine,methyl;monomethylhydrazine;CH3NHNH2;Hydrazine, methyl-;Methylydrazine;Hydrazomethane;Metylohydrazyna;MMH;Hydrazinomethane;N-methyl-hydrazine;methyl-hydrazin;methyl-hydrazine;
分子式：CH6N2
分子量：46.0717
精确质量：46.0531
Psa：38.05
Logp：0.1707

EINECS号：200-471-4
MDL号：MFCD00007621

外观与性状：无色液体带有一种像氨一样的气味
密度：0.875g/mLat 20°C(lit.)
沸点：88-90°C(lit.)
熔点：-21 °C
闪点：70°F
折射率：n20/D 1.4325(lit.)
水溶解性：soluble
稳定性：Stable. Flammable. Hygroscopic. Incompatible with strong oxidizing agents, copper, iron and their alloys.
储存条件：库房通风低温干燥,与酸类和氧化剂分开存放
蒸汽密度：1.6 (vs air)
蒸汽压：37.5 mm Hg ( 20 °C)

RTECS号：MV5600000
安全说明：S16-S26-S28-S36/37/39-S45-S60-S53-S24/25
WGK Germany：3
危险类别码：R11; R23/24/25; R45
危险品运输编码：UN 1244 6.1/PG 1
海关编码：2928000020
危险类别：6.1(a)
包装等级：I
危险品标志：F; T
危险性描述：H225; H300 + H310 + H330; H314; H350; H410
信号词：Danger
危险标志：GHS02, GHS05, GHS06, GHS08, GHS09
危险性防范说明：P201; P260; P280; P301 + P310 + P330; P303 + P361 + P353; P304 + P340 + P310; P305 + P351 + P338; P370 + P378