Roche ester (methyl 3-hydroxy-2-methylpropionate) is a chemical compound with formula C5H10O3. It can exist as two enantiomers. Both are commercially available and have been widely used as starting blocks for the synthesis of many targets including dictyostatin, discodermolide and spongidepsin.

CAS：80657-57-4
中文别名：3-羟基-2-甲基丙酸甲酯;(S)-(+)-3-羟基-2-甲基丙酸甲酯;(S)-3-羟基-2-甲基丙酸甲酯;3-羟基-2-甲基-丙酸甲酯;
英文别名：methyl (2S)-3-hydroxy-2-methylpropanoate;
分子式：C5H10O3
分子量：118.131
精确质量：118.063
Psa：46.53
Logp：-0.2122

MDL号：MFCD00064520

密度：1.071 g/mL at 25ºC(lit.)
沸点：74ºC(12 torr)
闪点：178 °F
折射率：n20/D 1.425

安全说明：S26-S36-S37-S39
危险类别码：R36/37/38; R20/21/22
WGK Germany：3
危险品运输编码：UN 1993
海关编码：2918199090
危险类别：3.2
包装等级：III
危险品标志：Xn