1314-13-2[O]=[Zn]XLOMVQKBTHCTTD-UHFFFAOYSA-NZinc oxide is a zinc molecular entity.
1314-13-2、155149-97-6、174846-83-4、174846-84-5、174846-85-6、174846-87-8、20431-17-8CHEBI:36560DescriptionZinc oxide occurs in nature as mineral zincite. It is the most important zinc compound and has numerous industrial applications. Zinc oxide is the pigment in white paints. It is used to make enamels, white printing inks, white glue, opaque glasses, rubber products and floor tiles. It is used in cosmetics, soaps, pharmaceuticals, dental cements, storage batteries, electrical equipment, and piezoelectric devices. Other applications are as a flame retardant, as a UV absorber in plastics, and a reagent in analytical chemistry. A major application of zinc oxide is in the preparation of most zinc salts. In medicine, the compound is used as an antiseptic, an astringent and a topical protectant.
HistoryHumans have long learned to use zinc oxide as a coating or topical medicine, but the history of human discovery of zinc oxide has been difficult to trace. In the "Chakra" which is Ancient India medical literature recorded in a later identified as zinc oxide drugs, used to treat eye diseases and trauma. The first century AD, the Greek doctor Dioscorides also referred to use zinc oxide to do the ointment. Avicenna completed in 1025 the "Hui prescription" in Zinc Oxide described for the treatment of various skin diseases, including skin cancer drug of choice. Nowadays, people no longer use zinc oxide to treat skin cancer, but still widely used in the treatment of other common skin diseases. As early as 200 BC, the Romans learned how to react with copper and zinc ore containing zinc oxide to make brass. Zinc oxide into zinc vapor in the shaft furnace, rolled into the flue reaction. Dioscorides also introduced this. Since the 12th century, the Indians have known zinc and zinc ore, and began to make zinc using the original way. Zinc smelting technology introduced in China in seventeenth Century. 1743, Bristol, Britain established the first zinc smelting plant in Europe. Another major use of zinc oxide is used as a coating, called zinc white. In 1834, zinc white became the Chinese watercolor paint for the first time, but insoluble in oil. But soon the problem was solved by the new zinc oxide production process. In 1845, Leclerc began to manufacture pigment of zinc white oil painting on a large scale in Paris, to 1850, zinc white popular throughout Europe. The purity of zinc white was so high that some artists painted zinc-white as a background at the end of the nineteenth century, but these paintings were cracked after a hundred years. In the second half of the 20th century, zinc oxide used in the rubber industry. In the 1970s, the second major use of zinc oxide is the additives of copy paper, but in the 21st century, the approach of zinc oxide has been eliminated as a copy paper additive. Figure 1 white zinc oxide powder
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UsesIndustry Application Role/benefit Rubber Manufacture of rubber Vulcanization accelerator/promotes the vulcanization rate and increases the vulcanization crosslinking degree Anti-aging agent/ protects rubber from fungi and UV light Reinforcing agent/promotes the intensity and thermal conductivity of rubber Ceramic Manufacture of ceramic glaze Fluxing agent/declines the melting point and improves the elasticity of glazes Pigment Paints,rubber,oil painting,paper coatings,ceramic,mineral makeup,etc. White pigment Coatings Metal anti-corrosive coatings Paints additive/helps paints to retain their flexibility and adherence for many years Plastic coatings Anti solar radiation and anti oxidation Energy-saving or heat-protecting windows ZnO:Al coatings selectively lets the visible part of the spectrum in Nuclear reactors Corrosion prevention Reduces the corrosion and minimizes the amount of dissolved materials Desulfurization of chemical raw gas Synthetic ammonia,petroleum,natural gas,methane,etc. Removes hydrogen sulfide by the reaction:H2S + ZnO → H2O + ZnS Medicine Treatment of a variety of skin conditions Active ingredient/antibacterial properties Antiseptic ointments,creams
UsesPreparation of zinc standard solutions. ZnO is much inferior to Ti02 in hiding power and is therefore used as a white pigment where some of its other properties are valued. It can, for instance, act as a fungistat in exterior oil paints. ZnO absorbs UV radiation and will therefore protect organic polymeric binders from photodegradation and reduce chalking. The largest use of ZnO is as an activator for vulcanization accelerators in natural and synthetic rubber.
UsesAntibiotic
Useszinc oxide has been used to protect, soothe, and heal the skin. Zinc oxide provides an excellent barrier to the sun and other irritants. It is somewhat astringent, anti-septic, and anti-bacterial. When used in sunscreen preparations, it provides both uVA and uVB protection, and can contribute to and/or increase SPF. At the appropriate particle size, zinc oxide is transparent in the visible light spectrum but opaque in the uVC ranges, thereby avoiding a whitening effect when incorporated into sunscreen preparations. Zinc oxide is included on the FDA’s list of approved sunscreen chemicals. It demonstrates an impressive synergistic effect when combined with organic sunscreens. Zinc oxide is also used when a white color is desired for a product. It is obtained from zinc ore, a commonly found mineral, and is relatively non-allergenic.
UsesZinc oxide is added to paints as a pigment and mold inhibitor and is known as zinc white when it is used as an oil paint by artists. It is used for cosmetics (ointment to protect nose and lips from ultraviolet sunlight), as a seed treatment, and as a dietary supplement.
UsesZinc oxide, ZnO, is a reactive white pigment prepared by vaporizing metallic zinc at a temperature of about 900°C in the presence of oxygen. As a pigment, ZnO is basic in nature and can react with certain types of acidic paint resins resulting in the formation of a brittle film on drying. Formation of such films leads to premature failure of paint. For this reason as well as because of its low RI,ZnO cannot compete for the hiding power of TiO2. Consequently, ZnO is rarely used as the sole pigment in modern coatings, although it finds some use in admixture with other pigments. ZnO is used in exterior house paints as a fungicide and in some can linings as a sulfide scavenger.
General DescriptionCrude zinc oxide is a yellow-gray granular solid with no odor. Zinc oxide has a specific gravity of 4.4. Zinc oxide is insoluble in water. The primary hazard is the threat posed to the environment. Immediate steps should be taken to limit its spread to the environment. Prolonged inhalation of the dust may result in metal fume fever with symptoms of chills, fever, muscular pain, nausea and vomiting.
PreparationZinc oxide is obtained as an intermediate in recovering zinc from minerals (See Zinc, Recovery). The oxide is prepared by vaporizing zinc metal and oxidation of the zinc vapors with preheated air (French process). The oxide can be produced by other processes. Another method involves roasting franklinite and other ores with coal and then oxidizing the product in air.
Definitionzinc oxide: A powder, white whencold and yellow when hot, ZnO; r.d.5.606; m.p. 1975°C. It occurs naturallyas a reddish orange ore zincite,and can also be made by oxidizinghot zinc in air. It is amphoteric,forming zincates with bases. It isused as a pigment (Chinese white) and a mild antiseptic in zinc ointments.An archaic name is philosopher’swool.
DefinitionZincite is a mineral form of zincoxide, ZnO.