73513-79-8 EINECS 277-517-5 Sodium hydrogen (5,8-dichloro-2-((5-chloro-2-hydroxyphenyl)azo)-1-naphtholato(2-))(4-hydroxy-3-((2-hydroxy-4-nitrophenyl)azo)naphthalene-1-sulphonato(3-))chromate(2-)