Pyridinium,1,1'-[1,2-phenylenebis(methylene)]bis[2-(2-sulfoethyl)-,dihydroxide,bis(innersalt), 1,1'-[1,2-phenylenebis(methylene)]bis[2-(2-sulfonatoethyl)pyridinium], Pyridinium,1,1'-[1,2-phenylenebis(methylene)]bis[2-(2-sulfoethyl)-,bis(inner salt) (9CI), EINECS 265-239-7, 1,1'-(1,2-Phenylenebis(methylene))bis(2-(2-sulphonatoethyl)pyridinium),