2,7-Naphthalenedisulfonic acid, 5-((2,4-dihydroxy-5-((4-(6-methyl-4-sulfo-2-benzothiazolyl)phenyl)azo)phenyl)azo)-4-hydroxy-3-((4-nitrophenyl)azo)- 5-((2,4-Dihydroxy-5-((4-(6-methyl-4-sulphobenzothiazol-2-yl)phenyl)azo)phenyl)azo)-4-hydroxy-3-((4-nitrophenyl)azo)naphthalene-2,7-disulphonic acid 72152-66-0 EINECS 276-418-4