83232-49-9 EINECS 280-283-7 Sodium (4-hydroxy-3-((2-hydroxy-1-naphthyl)azo)benzenesulphonamidato(2-))(4-hydroxy-3-((5-hydroxynaphth(2,1-d)-1,3-oxathiol-4-yl)azo)benzenesulphonamide S,S-dioxidato(2-))chromate(1-)