Magnesium carbonate 1.Purity:38%-41% 2.Appearance:white powder 3.Grade standard:Industrial Grade, Food Grade Magnesium carbonate1.Appearance: white powder2.Usage: It use as the reinforce and stuffing in the rubber industry. It can use to make adiabatic, fireproofing and heat preservation products, using in high class glasses, porcelain enamel and ceramic to make the surface brightness3.Packing: ...