The photodegradation of aqueous alcoholic solutions of fenarimol at lambda
greater than or equal to 250nm has been examined. UV irradiation of an aque
ous methanolic solution for 24h yielded two photoproducts, identified as 2,
4'-dichlorobenzil and p-chlorobenzoic acid, while irradiation of a solution
in aqueous isopropanol yielded p-chlorobenzoic acid and: two additional pr
oducts identified as 2,4'-dichlorobenzophenone and o-chlorobenzoic acid. A
mechanism for the formation of the photoproducts is suggested. (C) 2000 Soc
iety of Chemical Industry.