M 2177 (OTTO) Methyl nadic anhydride, 95% Cas 25134-21-8 - used for epoxy resin curing agent, suitable for casting, lamination. M 2177 (OTTO) Methyl nadic anhydride, 95% Cas 25134-21-8 - used as curing agent in the preparation of vertically aligned and penetrated carbon nanotube/polymer film.