D 1249 (OTTO) 1-Decene, 94% Cas 872-05-9 - used as a monomer in copolymers. D 1249 (OTTO) 1-Decene, 94% Cas 872-05-9 - used as an intermediate in the production of epoxides, amines, oxo alcohols, synthetic lubricants, synthetic fatty acids, and alkylated aromatics.