1--2-thiourea

1-(1-naphthyl)-2-thiourea

[¦wən ¦wən ′naf·thil ¦tü ‚thī·ə·yu̇′rē·ə] (organic chemistry) C10H7NHCSNH2 A crystalline compound with a melting point of 198°C; soluble in water, acetone, triethylene glycol, and hot alcohol; used as a poison to control the adult Norway rat.