Compositions containing certain bicyclic lactones and having insect repellent properties are disclosed. Such compositions comprise a compound of the formula:
or the corresponding unsaturated compound thereof having the formula:
wherein R, R', R" and R''' each are lower alkyl or hydrogen; wherein y is an integer from 1-3, and x and z each are 0 or 1, with the proviso that y is 1 or 2 when x is 1; and a carrier. A method of using such a repellent composition to repel an insect from a situs comprises applying to such situs an effective amount of the composition, with or without the carrier, and thereby repelling the insect from the situs.
Disclosed are compositions comprising at least one iodocarbon compound, a hydrofluorocarbon compound and at least one diene-based stabilizer. These compositions are generally useful as refrigerants for heating and cooling.