GB/T 8885-2008 ISO9001, 2200,14001 FINENESS : 99.0% Be widely used in food, medicine, starch further processing, paper ... %≤0.35≤0.450.3Acidity°T≤1.5≤1.81.5Ash%≤0.10≤0.150.1Black Spot≤0.4≤0.70.6Fat%≤0.10≤0.150.08Fineness%≥99.5≥99 ... .099.8Whiteness%≥88.0≥87.088 Shelf ...