2333. Citrus Red 2

Nomenclature

CAS number: 6358-53-8
1-[(2,5-Dimethoxyphenyl)azo]-2-naphthalenol; C.I. Solvent Red 80; C.I. 12156.
C18H16N2O3; mol wt 308.33.
C 70.12%, H 5.23%, N 9.09%, O 15.57%.

Description and 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.

Chemical structure

Properties

Crystals, mp 155-157°. Slightly sol in water; partially sol in ethanol and vegetable oils.

Use

To color orange skins.