Deltamethrin is in a variety of products used to kill a wide range of insects. Deltamethrin can be formulated in insecticide products as aerosols, sprays, dusts, granules and wettable powders. The illegal, unregistered product known as “Chinese Chalk” or “Miraculous Chalk” often contains deltamethrin as the active ingredient. “Chinese Chalk”, “Miraculous Chalk”, and products like them are not registered for use in the United States and illegal products such as these should be avoided at all times.
