A new epoxidation and oxidation technique has been discovered in which dilute hydrogen peroxide (30-50%) is utilized under essentially neutral conditions. The procedure involves the initial reaction of an organic nitrile with hydrogen peroxide to produce what is most likely a peroxycarboximidic acid. This has been used to epoxidize cyclohexene, styrene, and acrolein diethyl acetal in 73, 70, and 62% yields, respectively, as well as to oxidize ...