Synonyms: 1,3-Propanedisulfonicacid, 1,1'-[sulfonylbis(4,1-phenyleneimino)]bis[3-phenyl-, tetrasodium salt(9CI); 1,3-Propanedisulfonic acid,1,1'-[sulfonylbis(p-phenyleneimino)]bis[3-phenyl-, tetrasodium salt(6CI,7CI,8CI); 3668RP; Cimedone; Phenopryldiasulfone; Phenopryldiasulfonesodium; RP 3668; Solapsone; Solasulfone; Solusulfon; Solusulfone; Sulfetrone;Sulfonazina; Sulfonazine; Sulphedrone; Sulphetrone; Sulphonazine; Tetrasodium4,4'-bis(g-phenylpropylamino)diphenylsulfone a,g,a',g'-tetrasulfonate