... grade 3.low price and delivery immediately Zinc Oxide White Powder 99.7% Packing:25kg pp bag,20MT ... .4%max 0.3%max2. Property: Hexagonal crystal of white or powder, no smell, be insoluble in water , ... Oxide can be added into various materials and products, including rubber industry, plastics, ceramics, glass, cement, lubricants, paints, ... 4,Small quantity is welcomed Zinc Oxide for rubber vulcanization