English name: Complex amino acid level: BR total nitrogen: ≥ 11.5% amino acid nitrogen: ≥ 8.5% amino acid: ≥ 80.0% PH: 4.5 ~ 6.5 moisture: ≤ 7.5% flaming residue: ≤ 2.0% traits: yellowish powder. The natural compound amino acids made from fresh defatted silk cocoons and refined with advanced technology have no odor and taste of silkworm cocoons. They have unique aromas of amino acids, good water solubility, and their aqueous solutions are light brown and transparent. High content, amino acid content up to 78%, good quality, 18 kinds of amino acids complete use: Biochemical research preservation: RT