The formation of structures analogous to reversed micelles (SARM) during the high-temperature (150-170 degrees C) oxidation of hexadecane was shown by the method of solubilization of water-soluble dyes and iodine. By kinetic and UV spectroscopic techniques, it was found that the formation of SARM depended neither on temperature nor on the hexadecane oxidation mode. In this process, the SARM concentration remained relatively constant, and further oxidation occurred at the interface between the hydrocarbon and polar phases. The possible nature of oxygen-containing groups involved in the nonpolar hydrocarbon and polar phases is discussed.