... own highly purity (min 99%), low sulfur content (max0.0005), after treated with special process , Ca2+content is as low as 20~48ppm ... , Mg2+ content is as low as 5~8 ppm ... silicon ,metallurgical reductant Grade Tipical properties JX-8000 JX-9000 Sulfur, %≤0.0050.0005Ash, %≤0.060.03Heating loss, %≤ 0.50.2volatile ...