Name Of Index Sales Specification Appearance White Powder Total Al(OH)3 Content 99.5%min Total Al2O3 Content 64%min Total SiO2 Content 0.015%max Total Fe2O3 Content 0.02%max Moisture 8%-10% Loss on Ignition 34%-35% Whiteness 85%min Particle size + 150um (3% max) + 75um (45% max) + 45um (40% max) - 26um (8% max)