ABSTRACT
Isodrin should be resistant to hydrolysis since it contains no hydrolyzable functional groups. Isodrin will undergo phototransformation when irradiated with natural sunlight If released to air, isodrin should occur mostly adsorbed to particulate matter. It may undergo phototransformation possibly forming photoisodrin or isodrin vapor may react with photochemically generated hydroxyl radicals. If released to soil, isodrin may undergo microbial oxidation to endrin by a mechanism analogous to the biooxidation of aldrin to dieldrin. The bioconcentration factor of aldrin, a stereoisomer of isodrin, was found to be 4571 in mollusk, 3890 in golden orfe, 10,715 in an unspecified species of fish and 12,260 in alga. Isodrin has been classified as being relatively immobile in soil. Since isodrin and aldrin have similar chemical structures, isodrin is expected to have approximately the same Henry’s Law constant as aldrin. Photoisodrin is a phototransformation product of isodrin.
