Squalene
Title: Squalene
CAS Registry Number: 111-02-4
CAS Name: (all-E)-2,6,10,15,19,23-Hexamethyl-2,6,10,14,18,22-tetracosahexaene
Trademarks: Spinacene; Supraene (Robeco)
Molecular Formula: C30H50
Molecular Weight: 410.72
Percent Composition: C 87.73%, H 12.27%
Literature References: All trans isoprenoid contg six isoprene units. Found in large quantities in shark liver oil. Occurs in smaller amounts (0.1 to 0.7%) in olive oil, wheat germ oil, rice bran oil, and yeast. Intermediate in biosynthesis of cholesterol. Isoln: Heilbron et al., J. Chem. Soc. 1926, 1630. Structure: eidem, ibid. 1929, 873; Heilbron, Thompson, ibid. 883; Karrer et al., Helv. Chim. Acta 13, 1084 (1930); Karrer, Helfenstein, ibid. 14, 78 (1931); Karrer et al., ibid. 435. Crystal structure: J. Ernst et al., Angew. Chem. Int. Ed. 15, 778 (1976). Synthesis: Trippett, Chem. Ind. (London) 1956, 80; Dicker, Whiting, J. Chem. Soc. 1958, 1994; Cornforth et al., ibid. 1959, 2539; Johnson et al., J. Am. Chem. Soc. 92, 741 (1970); Hirai et al., Tetrahedron Lett. 1971, 4359; P. A. Grieco, Y. Masaki, J. Org. Chem. 39, 2135 (1974). Synthesis of squalene and trans-cis-trans-trans isomer: Biellmann, Ducep, Tetrahedron 27, 5861 (1971).
Properties: Oil. Faint, agreeable odor. Absorbs oxygen and becomes viscous like linseed oil. d420 0.8584; bp25 285°; bp2 240°; bp0.15 203°. Crystals from ether/methanol, mp -5°. nD20 1.4965. Viscosity at 25°: 12 cP. Iodine no. 360-380. Practically insol in water. Freely sol in ether, petr ether, CCl4, acetone, other fat solvents; sparingly sol in alc, glacial acetic acid.
Melting point: Crystals from ether/methanol, mp -5°
Boiling point: bp25 285°; bp2 240°; bp0.15 203°
Index of refraction: nD20 1.4965
Density: d420 0.8584
Use: Bactericide; intermediate in manuf of pharmaceuticals, organic coloring materials, rubber chemicals, aromatics and surface active agents.

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