Key pyrimidine intermediate with amino and chloro reactive groups. Available for substitution, condensation and coupling reactions. Widely used in synthesis of antitumor, antibacterial and antiviral drugs. Also serves as raw material for pesticides and biochemical reagents, extensively used in pharmaceutical development and fine chemical synthesis.

Slightly toxic and irritating solid. Avoid dust inhalation, work with ventilation and dust mask. Prevent skin and eye contact, flush with plenty of water after exposure. Decomposition produces toxic chloride gas. Keep away from high temperature and open flame. Separate storage from food and oxidants. Treat waste as hazardous material.