Synonyms: 3-[4-[[2-(Sulfooxy)ethyl]sulfonyl]phenylazo]-4-hydroxy-5-[[4-(3-sulfoanilino)-6-chloro-1,3,5-triazine-2-yl]amino]naphthalene-2,7-disulfonic acid tetrasodium salt;3-[4-[[7-[4-[[2-(Sodiooxysulfonyloxy)ethyl]sulfonyl]phenylazo]-3,6-bis(sodiooxysulfonyl)-8-hydroxynaphthalene-1-yl]amino]-6-chloro-1,3,5-triazine-2-ylamino]benzenesulfonic acid sodium salt;3-[4-[2-(Sodiosulfooxy)ethylsulfonyl]phenylazo]-4-hydroxy-5-[2-chloro-4-[3-(sodiosulfo)anilino]-1,3,5-triazine-6-ylamino]-2,7-naphthalenedisulfonic acid disodium salt;5-[4-Chloro-6-(3-sulfoanilino)-1,3,5-triazin-2-ylamino]-4-hydroxy-3-[4-[2-(sulfooxy)ethylsulfonyl]phenylazo]-2,7-naphthalenedisulfonic acid tetrasodium salt