White to faintly yellowish-white Powder

≥99.50 %

Carbonates and substances insoluble in acids:

≤0.01 % Sieve residue on 45 micron sieve

≤1 % (1 g, 500°C)

3.5 to 9 m²/g

≤0.3 ml/g (ml 0.1 N HCl/g)

≤5 ppm

≤10 ppm

≤200 ppm

≤50 ppm