68368-35-4 Barium bis(2,5-dichloro-3-((2-hydroxy-1-naphthyl)azo)toluene-4-sulphonate) Benzenesulfonic acid, 3,6-dichloro-2-((2-hydroxy-1-naphthalenyl)azo)-4-methyl-, barium salt (2:1) EINECS 269-866-7