P. Dureja et S. Walia, CHEMICAL AND PHOTOCHEMICAL TRANSFORMATION OF CHLOROTHALONIL, Toxicological and environmental chemistry, 37(3-4), 1993, pp. 215-220
Photolysis of chlorothalonil (2,4,5,6-tetrachloro isophthalonitrile) i
n dichloromethane by ultra violet light (>290 nm) was investigated. It
gave 2,5,6-trichloro-1,4-dicyanobenzene and 5,6-dichloro-1,4-dicyanob
enzene as the major photoproducts. Photolysis was followed by a steady
decrease in chlorothalonil and monodehalogenated product concentratio
n with a concomitant increase in the didehalogenated product. When thi
n films are exposed to sunlight, chlorothalonil has a half life of 9 h
rs on a glass surface.