What are the physical and chemical properties of 2-Chloro-5-pyrimidinamine (CAS: 56621-90-0)?

2-Chloro-5-pyrimidinamine (CAS: 56621-90-0) is a white crystalline solid with a molecular weight of approximately 137.57 g/mol. It is slightly soluble in water and more soluble in organic solvents like ethanol and acetone. The compound shows moderate reactivity towards nucleophiles, particularly amines, and can undergo substitution reactions. It is stable under normal laboratory conditions but should be protected from strong bases and reducing agents to avoid unwanted side reactions.