... ,SBS, etc. PARAMETERS SPECIFICATION1Average particle size,, μm 60-100 nm2Whiteness % 92 min3Absorption oil , ml/100g DOP 25±34PH(100g/l % )8 ... content, % 0.5 max6Treatment Fatty acidCaCO3 content (Dry basis), % 95 min CaO,% 53min MgO,% 0.8 max HCL insoluble Material max ... volatile at 105°C % m/m0.5 max activation(%) 98 min SSA(specific surface area) m2/g (BET) 20-22 gravity ...