Since 1986, we have produced Zinc oxide, MgO and MgCo³ for over 20 years and become one of the largest manufacturer of China in this field. Specifications: MgO %≥ 99.0 Insoluble in Hcl solution %≤ 0.05 CaO %≤ 0.13 Sulphate (SO4)%≤ 0.07 Screening residues(through 150um mesh) %≤ 0.02 Fe%≤ 0.0036 Mn%≤ 0.003 Chloride (Cl) %≤ 0.037 Losses in ignition %≥ 0.54 Accumulation density(g/ml) %≤ 0.22 Usage: 1) Used as an activator for vulcanization accelerators and as a reinforcing agent in natural and synthetic rubber 2) Used as a pigment in white paints, coatings and inks 3) Used as a mildewstat and acid buffer in paints 4) Used as a zinc dietary supplement for humans 5) Used us a fertilizer supplement and so on Packing: Packed in woven bags with liner N.W.: 25kg Also, we can provide you all kinds of goods base on your demand. Pls let me know your specific requirements for quotations, thirst for long-terms and stable cooperation with you. For more information pls e-mail/phone me.