: P 1855 (OTTO) Phthalimide, 98% Cas 85-41-6 - used in the synthesis of 6-amino agarose (AA) by Mitsunobu-inspired microwave mediated method. P 1855 (OTTO) Phthalimide, 98% Cas 85-41-6 - used as a precursor to other organic compounds as a masked source of ammonia.