This methyl 3-hydroxytetradecanoate is a high purity standard that is useful for the investigation of disorders and diseases. Polyhydroxyalkenoates, polyesters produced by bacteria fermentation, are used for carbon and energy storage and are of interest in studies regarding their synthesis, properties and mechanisms. Medium chain-length polyhydroxyalkenoate monomers such as 3-hydroxytetradecanoic acid may have pharmaceutical properties. The biologically natural chiral (R)-3- hydroxytetradecanoic acid is an intermediate in fatty acid biosynthesis. 3-hydroxytetradecanoic acid has been shown to have critical functions in bacteria.1 It has also been proposed as a measure for endotoxins from cotton lint and dust at high levels.2 3-hydroxy fatty acids are used as biomarkers for fatty acid oxidative disorders of both the long- and short-chain 3-hydroxyacyl- CoA dehydrogenases.3,4