tetrasodium 5-(benzoylamino)-3-[[4-[[4-(benzoylamino)-2-sulphonatophenyl]azo]-2-ethoxy-6-sulphonato-1-naphthyl]azo]-4-hydroxynaphthalene-2,7-disulphonate

5-Benzoylamino-3-[4-[4-(benzoylamino)-2-(sodiosulfo)phenylazo]-2-ethoxy-6-(sodiosulfo)-1-naphthalenylazo]-4-hydroxy-2,7-naphthalenedisulfonic acid disodium salt