Primaquine is a pharmaceutical substance commonly used in the treatment and prevention of malaria. Its chemical name is 8-[(4-Amino-1-methylbutyl)amino]-6-methoxyquinoline. The CAS number for primaquine is 90-34-6. This medication belongs to the class of 8-aminoquinolines and is known for its efficacy against Plasmodium parasites, the causative agents of malaria. Primaquine works by interfering with the DNA and RNA synthesis of the parasite, thereby inhibiting its ability to reproduce and spread throughout the body. It is often used in combination with other antimalarial drugs to provide a comprehensive approach to the treatment and prevention of malaria.