Certain 4-halo-5-aryl-1,2,3-dithiazole compounds and their preparation

A compound of the formula ##STR4## wherein X is fluoro, chloro, bromo, iodo and Ar is phenyl, naphthyl or phenyl or naphthyl substituted with 1 to 3 of the same or different substituents selected from hydroxy, fluoro, chloro, bromo, iodo, cyano, nitro, benzoyl, formyl, alkanoyl of 2 to 6 carbon atoms, alkyl of 1 to 6 carbon atoms, haloalkyl of 1 to 2 carbon atoms and 1 to 5 of the same or different halogens selected from fluoro, chloro or bromo, alkoxy of 1 to 4 carbon atoms, phenoxy, or phenoxy substituted with 1 to 2 of the same of different substituents selected from fluoro, chloro, bromo, iodo, trifluoromethyl, trichloromethyl, nitro, cyano or alkyl of 1 to 4 carbon atoms.