Prepn from palmitoyl chloride and cetyl alcohol in the presence of Mg: Paquot, Bouquet, Bull. Soc. Chim. Fr. 1947, 321; by CrO3H2SO4 oxidation of cetyl alcohol: Cymerman-Craig, Horning, J. Org. Chem. 25, 2098 (1960). Biosynthesis using inoculum of Nocardia salmonicolor: Davis, US 3169099 (1965 to Socony Mobil Oil).