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Zinc Oxide

Zinc Oxide

Category :

Inorganic chemicals/Others

CAS NO : 1314-13-2
EC NO : 215-222-5
Molecular Formula : ZnO
Main Specifications : 90%/ 95%/ 99%/ 99.7%
Synonyms : C.I. 77947;C.I. Pigment White 4;zincoxideheavy;flowers of zinc;zinc white;active zinc oxide;zinkoxyd aktiv;zinci oxidum;activox;activox b;actox14;zine oxide;zine white;zincoxide;actox16;actox216;ai3-00277;akro-zincbar85;akro-zincbar90;amalox;azo22;azo-33;azo-55;azo-55tt;azo-66;azo-66tt;ZNO;oxozinc;zinc oxygen(-2) anion;
Zinc Oxide
Package: 25kg/ 50kg/ 1000kg/ 1250kg
Uses : Rubber/ Ceramic/ Medicine/ Feed additive/ Pigment/ Coating
Molecular Structure:Zinc Oxide 1314-13-2
Product description: Pure ZnO is a white powder, but in nature it occurs as the rare mineral zincite, which usually contains manganese and other impurities that confer a yellow to red color.[8] Crystalline zinc oxide is thermochromic, changing from white to yellow when heated in air and reverting to white on cooling.[9] This color change is caused by a small loss of oxygen to the environment at high temperatures to form the non-stoichiometric Zn1+xO, where at 800 °C, x = 0.00007.[9] Zinc oxide is an amphoteric oxide. It is nearly insoluble in water, but it will dissolve in most acids, such as hydrochloric acid:[10] ZnO + 2 HCl → ZnCl2 + H2O Solid zinc oxide will also dissolve in alkalis to give soluble zincates: ZnO + 2 NaOH + H2O → Na2[Zn(OH)4] ZnO reacts slowly with fatty acids in oils to produce the corresponding carboxylates, such as oleate or stearate. ZnO forms cement-like products when mixed with a strong aqueous solution of zinc chloride and these are best described as zinc hydroxy chlorides.[11] This cement was used in dentistry.[12] Hopeite ZnO also forms cement-like material when treated with phosphoric acid; related materials are used in dentistry.[12] A major component of zinc phosphate cement produced by this reaction is hopeite, Zn3(PO4)2·4H2O.[13] ZnO decomposes into zinc vapor and oxygen at around 1975 °C with a standard oxygen pressure. In a carbothermic reaction, heating with carbon converts the oxide into zinc vapor at a much lower temperature (around 950 °C).[14] ZnO + C → Zn(Vapor) + CO Zinc oxide can react violently with aluminium and magnesium powders, with chlorinated rubber and linseed oil on heating causing fire and explosion hazard.[15][16] It reacts with hydrogen sulfide to give zinc sulfide. This reaction is used commercially.[citation needed] ZnO + H2S → ZnS + H2O
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