Torularhodin
Title: Torularhodin
CAS Registry Number: 514-92-1
CAS Name: 3¢,4¢-Didehydro-b,y-caroten-16¢-oic acid
Molecular Formula: C40H52O2
Molecular Weight: 564.84
Percent Composition: C 85.06%, H 9.28%, O 5.67%
Literature References: Carotenoid pigment found in Torula rubra and Rhodotorula mucilaginosa yeasts. Isoln: Karrer, Rutschmann, Helv. Chim. Acta 26, 2109 (1943). Structure and synthesis: Isler et al., ibid. 42, 864 (1959).
Properties: Fine dark purple needles from methanol + ether or toluene, mp 210-212° (vac, some decompn). Absorption max in CS2: 582, 541, 502 nm; in methanol: 529, 493, 460 nm. Freely sol in carbon disulfide, chloroform, pyridine; less sol in ether, benzene, hot ethanol; sparingly sol in methanol. Practically insol in petr ether.
Melting point: mp 210-212° (vac, some decompn)
Absorption maximum: Absorption max in CS2: 582, 541, 502 nm; in methanol: 529, 493, 460 nm
 
Derivative Type: Methyl ester
Molecular Formula: C41H54O2
Molecular Weight: 578.87
Percent Composition: C 85.07%, H 9.40%, O 5.53%
Properties: Dark red needles from benzene + methanol, mp 172-173°.
Melting point: mp 172-173°

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