D 1901 (OTTO) Diisopropyl azodicarboxylate, 98% Cas 2446-83-5 - used as an important reagent in the production of many organic compounds. D 1901 (OTTO) Diisopropyl azodicarboxylate, 98% Cas 2446-83-5 - used in association with triphenyl phosphine in Mitsunobu reaction of alcohols, acids and amides. It acts as reactant in the preparation of chromenes resembling classical cannabinoids, norbornene-based guanidine-rich polymers and acceptor-donor-acceptor organic dyes.