keratin hydrolyzed appearance:tiny yellow powder protein content:≥85.0% mositure:≤5.0% PH value:4.5-6.5(5% aqueous solution) lead:≤1.0mg/kg mercury:≤0.3mg/kg arsenic:≤0.5mg/kg pathogen:can not check out total germs:1000cfu/g coliform:≤30MPN/100g mold and yeast:≤50cfu/g packing: 0.5kg/bag, 20bags/carton