Sub Group: Heterocyclic Compounds Catalog Number: 8475 Formula: C4H3ClN2O2 CAS Number: 1820-81-1 Molecular Weight: 146.53 Synonyms: 5-Chloro-2,4(1H,3H)-pyrimidinedione5-Chloro-2,4-pyrimidinedioneNSC 28172