What are the physical and chemical properties of 2,4-Dichloro-5,7-dihydrothieno[3,4-d]pyrimidine (CAS: 74901-71-6)?

2,4-Dichloro-5,7-dihydrothieno[3,4-d]pyrimidine is a crystalline compound with a molecular weight of approximately 214.02 g/mol. It has a low solubility in water but is more soluble in organic solvents like ethanol and acetone. It is moderately reactive and can undergo nucleophilic substitution reactions. The compound is stable under normal conditions but should be stored in a cool, dry place away from direct sunlight.