Citrulline is the synthesis enzyme synthesis product that Aspartate Monohydrate meets the Arginine enzyme , the early time is one kind of chemical substance which withdraws from this watermelon, therefore calls Citrulline. Its pharmacological action can promote the urea formation in the liver , has the diuresis affects, is helpful to liver metabolism waste discharge, has the disintoxicating, the acceleration restores the weary function. In recent years, domestic and foreign, specially overseas, Citrulline takes one nutrition increases tonic massive uses in the period of patient technique recovery, by the parties studies Citrulline has the Viagra effect Citrulline’s physics and chemical property: White crystallization powder, the odorlessness, sweet, load density: 0.52 - 0.698gm/cc. Melting point 220-221C (decomposition), the natural temperature > 392f, no boiling point, By the flash point data reports, dissolves to the water, does not dissolve to the ethyl alcohol, organic solvent and so on methyl alcohol. Citrulline is no-responds with water, relatively stable under the acidic condition, meets the alkalinity medium can cause , the pyrolytic decomposition, should avoid with the strong oxidized medium contact. Citrulline is pyrolytic decomposition, burning, the deleterious substance which produces is the carbon monoxide, the carbon dioxide. Avoids with the eye, the skin direct contact, non- dangerous rank data report.