Einecs 282-454-1

disodium 3-[[2-[(dihydroxyarsino)oxy]phenyl]azo]-4,5-dihydroxynaphthalene-2,7-disulphonate

3-[[2-[(Dihydroxyarsino)oxy]phenyl]azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt