CAS Number: 138261-41-3 Standard: In-house standard Imidacloprid is a systemic insecticide from the neonicotinoid class, commonly used in agriculture to protect crops and in the treatment of fleas and ticks on pets. Its mechanism of action is by binding to receptors in the insect's nervous system, causing paralysis and death. However, concerns over its potential harm to non-target species and the development of resistance have led to increasing restrictions.