2-Naphthalenesulfonic acid,3,3'-[1,2-ethenediylbis[(3-sulfo-4,1-phenylene)azo]]bis[7-[(2,4-diamino-5-sulfophenyl)azo]-4-hydroxy-, hexapotassium salt
CAS No. 111930-26-8
2,2&prime 4540-66-3