The product buildup kinetics for hexadecane oxidation at 170 degreesC with oxygen were investigated, and the influence of the products on variations in the phase composition of the medium subjected to oxidation was studied. Experimental evidence for the formation of entities of the inverse micelle type in as early as the initial steps (20 min) of hexadecane oxidation was first obtained. Polar oxidation products responsible for micellization were isolated from the samples of oxidized hexadecane.