(4,4'-Biphenylylenebis(2-oxoethylene))bis((2-ethoxyethyl)dimethylammonium) dibromide 58594-13-1 AMMONIUM, (4,4'-BIPHENYLYLENEBIS(2-OXOETHYLENE))BIS((2-ETHOXYETHYL)DIMETHYL-, DI Ammonium, (4,4'-biphenylylenebis(2-oxoethylene))bis((2-ethoxyethyl)dimethyl-, dibromide