ОКСИД ЦИНКА - (1314-13-2)

Введение

имя: zinc oxide
* IUPAC
Количество CAS: 1314-13-2
Химическая формула: ZnO
Молярная масса: 81.4084 g
Массовая доля: Zn 80.346 %; O 19.653 % 

классификация

Использование / функции

• "Zinc oxide is used in making rubber, where it imparts desirable characteristics to the material. Zinc oxide is also used as a pigment in white paint and in enamels and glazes.

Zinc oxide (as well as certain other materials) is also used as a photoconductive surface in photocopiers. A photoconductive material becomes electrically conducting when exposed to light. The zinc oxide surface in the copier is electrically charged, then exposed to a light image from a printed document. Lighted areas of the photoconducting surface become electrically conducting, so that the electrical charge in these areas is drained away. Dark areas remain electrically charged, however. When a black powder, called the toner, is pread over the zinc oxide surface, it sticks to the electrically charged areas, producing an image of the document. This image is then transferred with heat to a sheet of paper." 1

• "As pigment in white paints instead of lead carbonate; in cosmetics, driers, quick-setting cements; with syrupy phosphoric acid or ZnCl2 in dental cements; manuf[acturing] opaque glass and certain types of transparent glass; manuf[acturing] enamels, automobile tires, white glue, matches, white printing inks, porcelains, zinc green; as a reagent in analytical chemistry; in electrostatic copying paper; as flame retardant; in electronics as semiconductor. Therapeutic: Astringent; topical protectant; ultraviolet screen. Therapeutic (Veteterinary): Antiseptic; astringent; topical protectant." 2

Физические свойства

Температура плавления:*
1974°C 3 = 2247.15 K = 3585.2°F

плотность (g/cm3):
5.67 2
* - 1 atm pressure

Связующие

Связующие: ionic
Ionic Character: 54.24 %

термохимия

ΔHf° (s): -83.24 kcal/mol 4 = -348.28 kJ/mol
S° (s): 10.43 cal/(mol•K) 5 = 43.64 J/(mol•K)
ΔGf° (s): -76.08 kcal/mol 6 = -318.32 kJ/mol

Реакции

Информация по технике безопасности

NFPA 704 Ratings:
Health: 2 - Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury.
Flammability: 1 - Must be heated before ignition can occur. Flash point over 93°C (200°F).
Reactivity: 0 - Normally stable, even under fire exposure conditions, and is not reactive with water.
Special Hazard: W - Reacts with water in an unusual or dangerous manner.

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Википедия
Журналы:
S. R. Pinnell et. al., Dermatol. Surg. 26, 309 (2000)

источники

(1) - Ebbing, Darrell D. General Chemistry 3rd ed.; Houghton Mifflin Company: Boston, MA, 1990; pp 782-783.
(2) - The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, 13th ed.; Budavari, S.; O'Neil, M.J.; Smith, A.; Heckelman, P. E.; Kinneary, J. F., Eds.; Merck & Co.: Whitehouse Station, NJ, 2001; entry 10200.
(3) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 4-95.
(4) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(5) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(6) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(7) - Swaddle, T.W. Inorganic Chemistry; Academic Press: San Diego, 1997; p 385.