Fosthiazate is a phosphonic ester that belongs to a class of pesticides and nematicides. Having a chemical formula of C9H18NO3PS2, fosthiazate is used to control the nematodes species that grow in a wide variety of crops. Fosthiazate is an organic phosphonate and an organothiophosphate insecticide that can be used as an agrochemicals or an antinematodal drug.