A method of producing arginine bicarbonate is provided including reacting an arginine slurry with a source of carbon dioxide gas under elevated temperature and low pressure to form a solution of at least 50% arginine bicarbonate, and recovering arginine bicarbonate from the solution.本發明提供一種製造精胺酸碳酸氫鹽的方法,包含在升溫及低壓下,使精胺酸漿體與二氧化碳氣體來源反應以形成至少50%精胺酸碳酸氫鹽之溶液,並從溶液回收精胺酸碳酸氫鹽。