Methylphosphonic acid is an organophosphorus compound with the chemical formula. CH3P(O)(OH)2. The phosphorus center is tetrahedral and is bonded to a methyl group, two OH groups and an oxygen. Methylphosphonic acid is a white, non-volatile solid that is poorly soluble in organic solvent but soluble in water and common alcohols.

CAS：993-13-5
中文别名：甲烷磷酸;
英文别名：Methanephosphonic acid;Methylphosphonate;PHOSPHONOMETHYL GROUP;Phosphonic acid, methyl-;Methyl-phosphonic acid;METHYLPHOSPHONIC ACID;Phosphonic acid,methyl;methylphosphononic acid;
分子式：CH5O3P
分子量：96.0224
精确质量：95.9976
Psa：67.34
Logp：-0.2061

MDL号：MFCD00002137

外观与性状：白色晶体或片
密度：1.495g/cm3
沸点：265.2ºC at 760mmHg
熔点：103-105ºC
闪点：114.2ºC
折射率：1.431
稳定性：Stable. Incompatible with strong oxidizing agents, strong bases.

安全说明：S26-S36/37/39-S45
危险类别码：R34
危险品运输编码：UN 3261 8/PG 2
海关编码：2931900090
包装等级：II
危险品标志：C