ZINC OXIDE
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⊡ Molecular formula, Reaction formula

⦁ ZnO, Zn(Vapor) +1/2O2 -> ZnO

⊡ CAS No

⦁ 1314-13-2

⊡ Characteristics

⦁ White powder( hexagonal system )
⦁ Molecular weight : 81.37
⦁ Gravity : 5.47 - 5.64
⦁ Specific gravity : (g/cc) : 0.3 - 0.6
⦁ PH : 6.95 - 7.37
⦁ Refractive index : 1.94 - 2.11
⦁ Specific heat(cal/mol/deg) : 9.61(at 25c)
⦁ Melting point : 1,800c
⦁ Oil absorption(%) : 10 -25
⦁ Solubility : Amphoteric oxide, Soluble in acid, alkali, Insoluble in water and alcohol
⦁ Toxicology : Non-toxic
⦁ It turns into yellow when heated 300c, but it return to its natural color if it is cool
⦁ Capability to block strong ultraviolet rays
⦁ Absorb carbon dioxide out of the air

⊡ Application
Rubber industry
⦁ Main raw material of rubber products is natural rubber latex, which is added the sulfur to give rubber elasticity
⦁ It is used for vulcanization accelerator which accelerate the reaction of rubble and sulfur and mixed 4-5% of rubber weight.
⦁ The biggest consumer in zinc-oxide market.
FERRITE industry
⦁ Ferrite is necessary for the raw material to absorb electric wave and making magnetic field of color TV, radio, microwave range.
Coat treatment
⦁ It is used for Anti-rust paints of coat treatment which makes film of zinc phosphate to give surface of metal corrosion resistance.
Glass industry
⦁ It is added to block the ultraviolet in the glass for TV
Ceramic industry
⦁ It is used for enamel and mixed material for ceramics
Other Use
⦁ lectronics : Varistor, Gas Sensor, Speaker etc
⦁ Feed stuff : It is a little added for feed stuff
⦁ Catalyst : Methanol, Catalyst to make acetone
⦁ Medicine, Cosmetic : Sun block, Bandages, Ointment
⦁ Etc : Paints, Pigment, Battery

⊡ General Specification
Grade S-1 KS-1 KS-2
ZnO(%) 99.7 Min 99.5 Min 99.3 Min
Water Soluble 0.05 Max 0.05 Max 0.1 Max
Moisture(%) 0.25 Max 0.25 Max 0.25 Max
Pb(%) 0.005 Max 0.01 Max 0.25 Max
Cd(%) 0.002 Max 0.005 Max 0.05 Max
Fitness thru 325 Mesh(%) 0.05 Max 0.05 Max 0.1 Max
Appearance White powder whithout a foreign substance
Manufacturing Process French
Types Available Powder, Granular, Pelletized

⊡ Typical Results
Grade S-1 KS-1 KS-2
ZnO(%) 99.8 99.7 99.5
Water Soluble 0.02 0.02 0.03
Moisture(%) 0.1 0.1 0.1
Pb(%) 0.001 0.005 0.08
Cd(%) trace trace trace
Fitness thru 325 Mesh(%) 0.01 0.01 0.05
Spec. Surface Area ((m2/g) 3.5 - 5.5 3.5 - 5.5 3.5 - 5.5
Manufacturing Process French
Types Available Powder, Granular, Pelletized

⊡ Packing Unit
Classification Unit Weight Packing Style
Powder Type 20kg Kraft Paper Bag
Powder Type 300kg, 450kg, 500kg PP Woven Bag
Granular Type 500kg, 800kg, 900kg,1000kg PP Woven Bag