Lysine is the necessary amino acid for the animal but which can not be synthesized by animal itself, therefore, it is called the most restrained amino acid.

Specifications:
Content:	65% min
Specific rotation:	+18.0~+21.5
Loss on drying:	1.0 % max.
Burn draff:	0.3% max.
Ammonium salt:	0.04% max.
Pb:	0.003% max
As:	0.0002% max
Ph(10g/dl)	5.0-6.0