Active zinc oxide(feed grade) Physical and chemical properties: Molecular formula: zno Molecular weight: 81.38 Appearance: yellowish powder. Bulk density: about 0.5g/ml Odor: odorless. Solubility: insoluble in water, alcohol; soluble in dilute acids. Specific gravity: 5.67 Ph: no information found. Melting point: 1975c (3587f) 161;241; high content of zinc is favorable to reduce animal diarrhea and ablactation, as well as to improve propagation. 161;241; active zinc oxide has the function of sterilization and constringency. It has high surface activity and energy level due to fine particles and large specific surface area. Index: The harmful elements such as pb, cd and as are very low in our product (tyson brand). Items Index Zn as zno 95--98 % Average particle diameter under electron microscope 161;¨¹40nm Average particle diameter tested by xrd 161;¨¹60nm Specific surface area161;y 40 m2/g Pb161;¨¹8ppm Mn161;¨¹10ppm Cu161;¨¹10ppm Cd161;¨¹4ppm Volatile at 105161;230; 161;¨¹0.7 % Soluble matter in water 161;¨¹0.7 % Hydrochloric acid insoluble 161;¨¹0.05 % Loss on ignition 161;¨¹4 % Packing in 25kg in net pp bag, 26mt in the 20'' fcl