1-Naphthol-8-amino-3,6-disulfonic Acid
Title: 1-Naphthol-8-amino-3,6-disulfonic Acid
CAS Registry Number: 90-20-0
CAS Name: 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid
Additional Names: 8-amino-1-naphthol-3,6-disulfonic acid; H acid
Molecular Formula: C10H9NO7S2
Molecular Weight: 319.31
Percent Composition: C 37.61%, H 2.84%, N 4.39%, O 35.07%, S 20.08%
Literature 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).
Properties: White crystals or gray powder. Slightly sol in water, alcohol, ether; sol in alkalies.
Use: Prepn of azo dyes.

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