chlo·ro·thal·o·nil 
(klôr′ə-thălə-nĭl′)
(klôr′ə-thălə-nĭl′)n.
A colorless crystalline compound, C8Cl4N2,used as a fungicide on a variety of vegetable crops, peanuts, lawns, and turfs and as a preservative in paints and adhesives.
[CHLORO- + (PH)THAL(IC) + N(ITR)IL(E).]