Synonyms: Benzenesulfonicacid, 4,4',4'',4'''-(21H,23H-porphine-5,10,15,20-tetrayl)tetrakis-, tetrasodiumsalt (9CI);5,10,15,20-Tetrakis(4-sulfophenyl)-21H,23H-porphine;5,10,15,20-Tetrakis(sodium 4-sulfonatophenyl)-21H,23H-porphyrin;5,10,15,20-Tetraphenyl-21H,23H-porphine-p,p',p'',p'''-tetrasulfonic acid tetrasodiumsalt;Tetrasodium 5,10,15,20-tetra(4-sulfonatophenyl)porphin;Tetrasodium5,10,15,20-tetra(4-sulfonatophenyl)porphine;Tetrasodium5,10,15,20-tetrakis(4-sulfophenyl)porphyrin;Tetrasodiummeso-tetra(4-sulfonatophenyl)porphine;Tetrasodium meso-tetra(sulfophenyl)porphyrinate;meso-Tetra(4-sulfonatophenyl)porphyrin sodium salt;meso-Tetrakis(4-sulfophenyl)porphyrin tetrasodium salt;meso-Tetrakis(p-sulfophenyl)porphine tetrasodium salt;