A 2684 (OTTO) Atropine methyl nitrate 99% Cas 52-88-0 - used as reagent in chemical research. A 2684 (OTTO) Atropine methyl nitrate 99% Cas 52-88-0 - used for its peripheral muscarinic effects (bladder, respiratory, to block parasympathetic signaling to the heart, etc.) and to separate central from peripheral effects or protect against peripheral side effects when using muscarinics that do cross the blood brain barrier.