Also Called: Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[ 5-[[4,6-bis(phenylamino)-1,3,5-triazin-2-yl]amino ]-, disodium salt;Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[[4,6-bis(phenylamino)-1,3,5-triazin-2-yl]amino]-, sodium salt (1:2);Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[[4,6-bis(phenylamino)-1,3,5-triazin-2-yl]amino]-, disodium salt