Einecs 281-117-6

calcium 2-[[2-hydroxy-3-[[(3-nitrophenyl)amino]carbonyl]-1-naphthyl]azo]naphthalenesulphonate

Bis[2-[[2-hydroxy-3-[[(3-nitrophenyl)amino]carbonyl]-1-naphthalenyl]azo]-1-naphthalenesulfonic acid]calcium salt