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English Name: Rubber Grade Zinc Oxide Molecular formula: ZnO Molecular weight : 81.39 ItemIndexZinc oxide ( ZnO ),% ≥ 99-99.7lead oxide ( Pb ),% ≤ 0.03-0.50Oxide of manganese ( Mn ),% ≤ 0.0001-0.0005copper oxides ( Cu ),% ≤ 0.0003-0.006Insoluble matter in HCl,% ≤ 0.006-0.100Loss on ignition ,% ≤ 0.2-1.0Screen residues through(45 um mesh ) , % ≤ 0.1-0.3Water soluble matter ,% ≤ 0.1-0.8Volatile 105°C 0.3-0.5Properties: Zinc oxide white hexagonal crystal system crystalline or powder; Relative density is 5.606, melting point 1975°C, it is amphoteric oxide insoluble in water, ethanol and ammonia, soluble hydroxide and ammonium chloride, while heated, it becomes yellow and resumes white after cooling down. Characteristic: The products have bellowing characteristics compare with the same products 1.The particle size is very small and well-proportioned so that it can be soluted with other elements very well, and lower the physical parametererror of the electronic component. 2.High purity, it is convenient to operate and better for the efficient use. 3.Other elements is very little, little affect for the electronic component, can reduce the error for the practical parameter. Uses: rubber grade zinc oxide is multi-purpose rubber accessory ingredient, is used in vulcanization, accelerator and reinforcing agent, dyeing agent, filler and heat conductive, inorganic activator, is used in series of products such as steel radial tyre, bias tyre, conveyer belt, rubber tube and tape, rubber shoes, emulsion glove productions etc. Packing: 25kg/bag or as the client’s request Storage: packed in dry and airiness place, no contact with acid and alkali , In good condition, its valid period is one year (the packing should be sealed), if expired, qualified product is still available .