Synonyms: 2-Naphthoicacid, 4,4'-methylenebis[3-hydroxy- (6CI,7CI,8CI);2,2'-Dihydroxy-1,1'-dinaphthylmethane-3,3'-dicarboxylic acid;4,4'-Methylenebis(3-hydroxy-2-naphthalenecarboxylic acid);4,4'-Methylenebis[3-hydroxy-2-naphthoic acid];Bis(2-hydroxy-3-carboxy-1-naphthyl)methane;Embonic acid;KG 122;NSC 30188;NSC 40132;