M 1860 (OTTO) o-Methoxylamine hydrochloride, 99% Cas 593-56-6 - used as a reagent in the preparation of O-methyl oximes. M 1860 (OTTO) o-Methoxylamine hydrochloride, 99% Cas 593-56-6 - used in the synthesis of O-methyl oximes from aldehydes or ketones.