Fatty acids are long hydrocarbon chain molecules with a -COOH group at the end that are derived from plants and animals. Their classification, chemical structure, and characteristics are determined by the length of the hydrocarbon chain, extent of unsaturation, and location of the double bonds. Fatty acids are important in metabolic activities because they serve as a biochemical fuel, an element of all cellular membrane, and a gene regulator. Furthermore, fatty acids have a variety of industrial applications. The seed oils from different plant species have saturated, unsaturated and unusual fatty acids. The saturated fatty acids mainly found in plants species are myristic, palmitic and stearic acids. The unsaturated fatty acids found in most of the plants species are oleic, linoleic and linolenic acids. The unusual fatty acids are rarely reported in few plants species are hydroxy fatty acids and cyanolipids. The seed oils from plant belonging to sapindaceae family mainly contained arachidic acid and cyanolipids. The malvalic and sterculic acid are mainly contained cyclopropane ring in their structure.