1-amino-2-naphthol-4-sulfonic acid

1-amino-2-naphthol-4-sulfonic acid

[¦wən ə′mē·nō ¦tü ′naf‚thȯl ¦fȯr səl′fän·ik ′as·əd]
(organic chemistry)
H2NC10H5(OH)SO3H White or gray, needlelike crystals; soluble in hot sodium bisulfite solutions; used in the manufacture of azo dyes.