97403-79-7 EINECS 306-741-9 Trihydrogen (2-(4-((3-hydroxy-4-((1-hydroxy-3-sulpho-7-(3-sulphoanilino)-2-naphthyl)azo)phenyl)azo)phenyl)-6-methyl-7-benzothiazolesulphonato(5-))cuprate(3-)