Used to synthesize local anesthetics (butacaine hydrochloride), antihistamines, antispasmodics, and antihypertensive drugs. Raw materials such as emulsifiers, textile additives, corrosion inhibitors, flocculants, scale inhibitors, ion exchange resins and dyes can also be prepared. Used as a catalyst for aqueous epoxy resin group reactions. It is also used as a curing catalyst for one-component moisture-curing polyurethane hot melt adhesives and a catalyst for chelation reaction of 2402 resin with active magnesium oxide. It is also used as a low-temperature curing accelerator for epoxy resins and polyurethane foam. It is also used as a neutralizing agent for temperature-phase transfer aqueous epoxy resin emulsions and aqueous polyurethane adhesives [2].