Citrus Red 2
Title: Citrus Red 2
CAS Registry Number: 6358-53-8
CAS Name: 1-[(2,5-Dimethoxyphenyl)azo]-2-naphthalenol
Additional Names: C.I. Solvent Red 80; C.I. 12156
Molecular Formula: C18H16N2O3
Molecular Weight: 308.33
Percent Composition: C 70.12%, H 5.23%, N 9.09%, O 15.57%
Literature References: Prepn: H. W. Elley, H. W. Daudt, US 2224904 (1940 to Du Pont). Metabolism: J. L. Radomski, J. Pharmacol. Exp. Ther. 134, 100 (1961); 136, 378 (1962). Toxicology: M. Sharratt et al., Food Cosmet. Toxicol. 4, 493 (1966). Review of carcinogenicity studies: IARC Monographs 8, 101-106. See also Colour Index vol. 4 (3rd ed., 1971) p 4033.
Properties: Crystals, mp 155-157°. Slightly sol in water; partially sol in ethanol and vegetable oils.
Melting point: mp 155-157°
Use: To color orange skins.

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