... amino acid and increase digestibility and save protein materials. L-lysine HCL, feed grade, 98.5%1) Appearance: white, light yellow ... or browish powder, odorless or with light peculiar lysine smell.2) Assay (on dry base): min 98.5%3 ... .003%8) Arsenic (As): max 0.0002%9) PH (10g/dl):5.0-6.0 L-lysine HCL