(±)-trans-9,10-Epoxystearic Acid Methyl Ester-d3 is labelled (±)-trans-9,10-Epoxystearic Acid Methyl Ester (E589910) which is a useful synthetic intermediate. It is an intermediate used to prepare (±)-erythro- and (±)-threo-9,10-difluorostearic acids. It is also used to synthesize monofluorinated fatty acids.