White crystal or crystalline powder, odorless, sweet taste, due to the lysine pure product is easy to absorb moisture agglomeration, in order to facilitate the separation and purification and application, often made of hydrochloride. Usually more stable (relative humidity below 60%), relative humidity above 60% and moisture-absorbing lumps, resulting in dihydrate. Easily soluble in water (40%, 35 ° C), a few insoluble in ethanol and ether, and reducing sugar such as glucose is decomposed by co-heating, resulting in appetizing bread flavor. mp 263-264 ° C, isoelectric point of 10.56, [α]25D +13.5 ° (H2O), [α]25D +26.0 (5mol / L HCl). Lysine is one of the essential amino acids. Nutritionists classify it as the "first deficient amino acid". It plays an important role in maintaining the ammonia balance of the human body. If the body lacks lysine, it will cause protein metabolism disorders, in the development of children, recovery from diseases and pregnancy and lactation, the nutritional requirements for lysine are higher.
