... density, g/cm3 ≤0.87Specific Surface, cm2/g ≤8000Settling value, ml/g ≥---Top Cut(D98), μm ≤35Average Grain(D50), μm ≤16Fe, % ≤0 ... , % ≤ 125μm, % ≤0 0.6Whiteness(R457), % ≥93Absorption oil Number (DOP), ml/100g ≤38Activation, % ≥---AppearancePOWDER4.feature:insoluble in water, soluble in acids ...