20719-29-3 NSC 125030 Pyrimidinium, 4,4'-(1,4-phenylenebis(carbonylimino-4,1-phenylene-imino))bis(2-amino-1-ethyl-, salt with 4-methylbenzenesulfonic acid (1:2) (9CI) Pyrimidinium, 4,4'-(terephthaloylbis(imino-p-phenyleneimino))bis(2-amino-1-ethyl-, di-p-toluenesulfonate