68368-34-3 Barium bis(6-chloro-3-((2-hydroxy-1-naphthyl)azo)toluene-2-sulphonate) Benzenesulfonic acid, 3-chloro-6-((2-hydroxy-1-naphthalenyl)azo)-2-methyl-, barium salt (2:1) EINECS 269-865-1