6385. 1-Naphthol-8-amino-3,6-disulfonic Acid

Nomenclature

CAS number: 90-20-0
4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid; 8-amino-1-naphthol-3,6-disulfonic acid; H acid.
C10H9NO7S2; mol wt 319.31.
C 37.61%, H 2.84%, N 4.39%, O 35.07%, S 20.08%.

Description and references

Prepn: Willard, Color Trade J. 15, 40 (1924); Mow, US 2272272 (1942 to Allied Chem.); Hayashi, Yamaguchi J. Sci. 2, 67 (1951), C.A. 49, 2390f (1955); Roos et al., US 2875243 (1959 to Bayer).

Chemical structure

Properties

White crystals or gray powder. Slightly sol in water, alcohol, ether; sol in alkalies.

Use

Prepn of azo dyes.