L-Lysine Mono USP/Feed Grade is equal to 78.8% of amino acids that can be easily metabolized and digested by animals to make body proteins. The supplementation level of lysine in feed is 0.5% or more according to the animal species. It contains C6H14N2O2-HCLin 98.5% min with Ammonium salt (NH4+) in the amount of 0.04% max and heavy metals (Pb) in 30ppm max. Its pH is 5.0-6.05.58. It is widely used as amino acid in the food of pig, poultry, etc. owing to its large amount of inorganic salts. It improves animals absorbing properties and promotes animals' growth rate.