Used primarily in organic synthesis as a reagent for the protection of carbonyl compounds. It reacts with aldehydes and ketones to form oximes, which are stable intermediates that can be later deprotected to regenerate the original carbonyl group. This property is particularly useful in multi-step synthetic processes where selective protection of functional groups is required. Additionally, it serves as a building block in the preparation of various pharmaceuticals and agrochemicals. Its hydrochloride form enhances solubility, making it more convenient for use in aqueous reaction conditions.