Alizarin Cyanine Green F
Title: Alizarin Cyanine Green F
CAS Registry Number: 4403-90-1
CAS Name: 2,2-[(9,10-Dihydro-9,10-dioxo-1,4-anthracenediyl)diimino]bis(5-methylbenzenesulfonic acid) disodium salt
Additional Names: 6,6ยข-(1,4-anthraquinonylenediimino)di-m-toluenesulfonic acid disodium salt; D & C Green No. 5; C.I. Acid Green 25; C.I. 61570
Molecular Formula: C28H20N2Na2O8S2
Molecular Weight: 622.58
Percent Composition: C 54.02%, H 3.24%, N 4.50%, Na 7.39%, O 20.56%, S 10.30%
Literature References: Discovered by R. E. Schmidt in 1894: Colour Index vol. 4 (3rd ed., 1971) p 4541.
Properties: Green powder. Slightly sol in acetone, alc, pyridine. Insol in chloroform, toluene. Dull blue soln in conc H2SO4, turning turquoise on dilution. Absorption spectra: C. F. H. Allen et al., J. Org. Chem. 7, 63, 169 (1942).
Use: For nylon sutures: Fed. Regist. 42, 52395 (1977). Permitted for use in drugs and cosmetics, excluding use in eye area: ibid. 47, 49628 (1982).

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