Synonyms: 2-Naphthalenesulfonic acid, 6-hydroxy-, monosodium salt, reaction products with m-cresol, formaldehyde and sodium bisulfite, sodium salts;2-Naphthalene sulfonic acid,6-hydroxy-, monosodium salt ,reaction products with m-cresol formaldehyde and sodium bisulfite sodium salts 2-Naphthalene sulfonic acid,6-hydroxy-,monosodium salt,reaction products with m-cresol formaldehyde and sodium bisulfite sodium salts