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5-Tetradecenoic acid

5-Tetradecenoic acid (CAS: 544-66-1), also known as physeterate or physeteric acid, is a member of the class of compounds known as long-chain fatty acids. Long-chain fatty acids are fatty acids with an aliphatic tail that contains between 13 and 21 carbon atoms. Thus, 5-tetradecenoic acid is considered to be a fatty acid lipid molecule. 5-Tetradecenoic acid is practically insoluble (in water) and a weakly acidic compound (based on its pKa). 5-Tetradecenoic acid can be found primarily in blood. Within the cell, 5-tetradecenoic acid is primarily located in the cytoplasm and in the membrane. It can also be found in the extracellular space. 5-Tetradecenoic acid is an intermediate of unsaturated fatty acid metabolism found in the plasma of patients with very long chain acyl-CoA dehydrogenase (VLCAD) deficiency, a genetic disorder (PMID: 7586519).