1,3-Benzenediol, 4-((5-chloro-2-hydroxyphenyl)azo)- 4-((5-Chloro-2-hydroxyphenyl)azo)resorcinol 4867-01-0 Benzene, 4-chloro-1-hydroxy-2-((2,4-dihydroxyphenyl)azo)- EINECS 225-473-2