2,4(1H,3H)-Pyrimidinedione, 5,6-diamino-, sulfate (2:1) 2,4-Dioxo-1H,3H-pyrimidine-5,6-diammonium sulphate 3240-72-0 5,6-Diaminouracil semisulfate 63981-35-1 AI3-61835 EINECS 264-589-8 Uracil, 5,6-diamino-, hemisulfate