Title: d-Carotene

CAS Registry Number: 472-92-4

CAS Name: e,y-Carotene

Molecular Formula: C40H56

Molecular Weight: 536.87

Percent Composition: C 89.49%, H 10.51%

Literature References: Extracted from the fruit of Gonocaryum pyriforme Mig., Icacinaceae: Winterstein, Z. Physiol. Chem. 219, 249 (1933). Occurs also in carrots and certain varieties of tomatoes. Isoln from tomato mutants: Porter, Murphey, Arch. Biochem. Biophys. 32, 21 (1951). Structure: Kargl, Quackenbush, ibid. 88, 59 (1960). Synthesis: Manchand et al., J. Chem. Soc. 1965, 2019. Absolute configuration: Buchecker, Eugster, Helv. Chim. Acta 54, 327 (1971).

Properties: Long orange-red needles from CS2 + hexane + ethanol, mp 140.5°. [a]Cd +317°; [a]D25 +352° ±16% (hexane). Absorption spectrum: Kargl, Quackenbush, loc. cit.

Melting point: mp 140.5°

Optical Rotation: [a]Cd +317°; [a]D25 +352° ±16% (hexane)