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|Section2= |Section3= |Section4= |Section5= }} Squalane is a hydrocarbon and triterpene derived by hydrogenation of squalene. Due to the complete saturation of squalane, it is not subject to auto-oxidation. This fact, coupled with lower costs associated with squalane make it desirable in cosmetic applications where it is used as an emollient and moisturizer.〔"Squalane: the natural moisturizer", by Rosenthal, Maurice L. in ''Chemistry and Manufacture of Cosmetics'' (3rd Edition), Editor: Schlossman, Mitchell L. (2002), 3(Bk. 2), 869-875〕 The hydrogenation of squalene was first reported in 1916.〔Tsujimoto, M. A highly unsaturated hydrocarbon in shark liver oil. Ind. Eng. Chem. 1916, 8, 889−896.〕〔 Squalene is sourced from the livers of sharks. Approximately 3000 sharks are required to produce one ton of squalene.〔 Due to environmental concerns, olive oil as an alternative non-animal source has been developed and commercialized. Another commercial non-animal source is phytosqualane, a compound derived from a farnesene in a sugar cane sucrose fermentation over genetically modified Sacccharomyces cerevisiae yeast strains.〔 Farnesene is dimerised to isosqualane and then hydrogenated to squalane. ==Cosmetics use== Squalane was introduced as a emollient in the 1950s by French company Laserson & Sabetay.〔''Catalytic Hydrogenation of Squalene to Squalane'' Rosaria Ciriminna, Valerica Pandarus, François Béland, and Mario Pagliaro Organic Process Research & Development Article 〕 The label of squalane as "natural moisturizer" is somewhat exaggerated. While squalane can be found in small quantities in sebaceous secretions (sebum), it is squalene that is most commonly found in nature, most notably in the livers of sharks. Squalane has low acute toxicity and is not an irritant at the concentrations used in cosmetics. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Squalane」の詳細全文を読む スポンサード リンク
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