2,4,5,6-Pyrimidinetetramine, sulfite (1:1) 2,4,5,6-Tetraaminopyrimidine sulfite 63449-92-3 EINECS 264-163-1 Pyrimidine, 2,4,5,6-tetraamino-, sulfite (1:1) Pyrimidinetetramine sulphite (1:1)