1.Molecular Formula: H2Mg3O12Si4 2.Size: 200-5000mesh 3.Appearance:white powder 4.Whiteness:78% to 92% 5.25kg packing Talc powder has properties of lubricity, viscous resistance, flowing boosting, fire resistance, acidoresistance, insulativity, high melting point, inactive der chemismus, good covering power, soft, good shining, good adsorptivity. It can be used in industries of food, rubber, ...