α-Naphthylthiourea (ANTU) is an organosulfur compound with the formula C10H7NHC(S)NH2. This a white, crystalline powder although commercial samples may be off-white. It is used as a rodenticide and as such is fairly toxic. Naphthylthiourea is available as 10% active baits in suitable protein- or carbohydrate-rich materials and as a 20% tracking powder.
==Synthesis== Like other thioureas, ANTU can be prepared by several routes. The usual method is the reaction of 1-naphthylamine hydrochloride with ammonium thiocyanate: [C10H7NH3]Cl + NH4SCN → C10H7NHC(S)NH2 + NH3 + HCl It is produced from the reaction of 1-naphthyl isothiocyanate with ammonia. C10H7NCS + NH3 → C10H7NHC(S)NH2
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