2-amino-5-naphthol-7-sulfonic acid

2-amino-5-naphthol-7-sulfonic acid

[¦tü ə′mē·nō ¦fīv ′naf‚thȯl ¦sev·ən səl′fän·ik ′as·əd] (organic chemistry) C10H5NH2OHSO3H Gray or white needles that are soluble in hot water; used as a dye intermediate.