5-Chloro-3-((2-hydroxy-1-naphthalenyl)azo)-4-methylbenzenesulfonic acid, barium salt (2:1) 67892-50-6 Barium bis(2-chloro-6-((2-hydroxy-1-naphthyl)azo)toluene-4-sulphonate) Benzenesulfonic acid, 3-chloro-5-((2-hydroxy-1-naphthalenyl)azo)-4-methyl-, barium salt (2:1) EINECS 267-583-3