... content 4.Appearance:white powder Our products magnesium carbonate conform in Standard:HG/T2959-2000 ... of magnesium, magnesium oxide, fireproof, paint, ink, pottery, glass, toothpaste, rubber, pigment, dately used product industry, also ... industry, as high-quality filler and reinforcement agent of rubber products, as fireproof and thermal insulation materials resistant to high temperature. magnesium ...