The Fatty Acid Screening Library contains more than 75 compounds of fatty acids with diverse biological activities in a 96-well Matrix tube rack format as 2 mM stocks in DMSO. The library may also include some of the most commonly-ordered fatty acids, including arachidonic, linoleic, eicosapentaenoic, stearic, α- and γ-linolenic, oleic, and palmitic acids. As well as some unusual fatty acids, including 9-thiastearic acid, 2-hydroxymyristic acid, AUDA, and CUDA may be included.