Synonyms: Benzoic acid, 2-hydroxy-, reaction products with formaldehyde, coupled with diazotized 5-amino-8-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-2-naphthalenesulfonic acid disodium salt;benzoic acid, 2-hydroxy-, reaction products with formaldehyde, coupled with diazotized 5-amino-8-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-2-naphthalenesu;Benzoic acid, 2-hydroxy-,reaction products with formaldehyde,coupled with diazotized 5-amino-8-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-2-naphthalene sulfonic acid disodium salt;Benzoic acid,2-hydroxy-,reaction products with formaldehyde,coupled with diazotized 5-amino-8-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-2-naphthalene sulfonic acid disodium salt;lfonic acid disodium salt