This product is a high purity methyl ester fatty acid and is ideal as a gas chromatography standard. This odd numbered longchain fatty acid is unusual in most biological systems and is therefore often useful as an internal standard.{50583} This fatty acid is used by insects as a pheromone such as in the secretions of some termites.{50584} It is found in very small amounts in some cooking fats and oils{50585} and in trace amounts in milk.{50586} It exhibits inhibitory effects on fibrinolysis and plasmin activity and it has been reported to have biological functions as an anti-tumor agent and the ability to inhibit IL-12 production.