3-((2-Chlorothiazol-5-yl)methyl)-5-methyl-1,3,5-oxadiazinan-4-imine Hydrochloride is an intermediate for the synthesis of N-(3-((2-Chlorothiazol-5-yl)methyl)-5-methyl-1,3,5-oxadiazinan-4-ylidene)benzenesulfonamide (C385860), which is an impurity of Thiamethoxam (T344180), a neonicotinoid insecticide.