... exporter of choline chloride feed grade, export choline chloride corn COB 60%min, 50%min, choline chloride silica 50% ... Main types as following:1/Corn COB, color depends on the color of the corn COB.2/Natural silica, ... powder with good fluid.Spec: A) Choline Chloride Corn Cob 50%Min or 60%Min Feed Grade:ItemIndexCholine Chloride ... ≤0.2Heavy Metal (Pb) (%) ≤0.002 Choline Chloride Corn Cob Feed Grade