L-Aspartic acid is a white and odorless crystal powder with little acidity. It slightly dissolves in water and insolube in alcohol and ether. Molecular formula: C4H7NO4 L-Aspartic acid is a kind of important natural amino acid. In medicine, it is used as medicine of cardiopulmonary, hepatic function accelerator, eliminating fatigue agent and the composition of amino acid injection. In industry, it is a main material of L-Alanine. In food, it can be used as freshening agent, high sweetness agent of low heat and uncorrosing tooth, and eliminating fatigue agent in drink of sports type.