Wikipedia

Zinc oxide

Zinc oxide is an inorganic compoond wi the formula ZnO.

Zinc oxide
Names
Ither names
Zinc white, calamine, filosofer's oo, Cheenese white, flouers o zinc
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
EC Nummer 215-222-5
RTECS nummer ZH4810000
Properties
ZnO
Molar mass 81.406 g/mol[1]
Appearance White solit[1]
Odour Odourless
Density 5.1 g/cm3[1]
Meltin pynt 1,974 °C (3,585 °F; 2,247 K) (decompones)[1][5]
Bylin pynt 1,974 °C (3,585 °F; 2,247 K) (decompones)
0.0004% (17.8°C)[2]
Baund gap 3.3 eV (direct)
Magnetic susceptibility −27.2·10−6 cm3/mol[3]
Refractive index (nD) n1=2.013, n2=2.029[4]
Structur[6]
Wurtzite
Space group C6v4-P63mc
a = 3.2495 Å, c = 5.2069 Å
2
Tetrahedral
Thermochemistry[7]
Speceefic heat capacity, C 40.3 J·K−1mol−1
Staundart molar
entropy So298 		43.7±0.4 J·K−1mol−1
Std enthalpy o
formation ΔfHo298 		-350.5±0.3 kJ mol−1
-320.5 kJ mol−1
Pharmacology
QA07XA91 (WHO)
Hazards
Safety data sheet ICSC 0208
EU clessification Dangerous for the environment (N)
R-phrases R50/53
S-phrases S60, S61
NFPA 704
NFPA 704 four-colored diamondFlammability code 1: Must be pre-heatit afore igneetion can occur. Flash pynt ower 93 °C (200 °F). E.g., canola ileHealth code 2: Intense or continued but nae chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroformReactivity code 0: Normally stable, even unner fire exposur condeetions, an is nae reactive wi watter. E.g., liquid nitrogenSpecial hazards (white): no code
1
2
0
Flash pynt 1,436 °C (2,617 °F; 1,709 K)
Lethal dose or concentration (LD, LC):
240 mg/kg (intraperitoneal, rat)[8]
7950 mg/kg (ratton, oral)[9]
2500 mg/m3 (moose)[9]
2500 mg/m3 (guinea pig, 3–4 h)[9]
US heal exposur leemits (NIOSH):
PEL (Permissible)
 TWA 5 mg/m3 (fume) TWA 15 mg/m3 (tot dist) TWA 5 mg/m3 (resp dist)[2]
REL (Recommendit)
 Dust: TWA 5 mg/m3 C 15 mg/m3

Fume: TWA 5 mg/m3 ST 10 mg/m3[2]

IDLH (Immediate danger)
 500 mg/m3[2]
Relatit compoonds
Ither anions
 Zinc sulfide
Zinc selenide
Zinc telluride
Ither cations
 Cadmium oxide
Mercury(II) oxide
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
YesY verify (whit is YesYN ?)
Infobox references

References eedit

  1. ↑ a b c d Haynes, p. 4.100
  2. ↑ a b c d NIOSH Pocket Guide tae Chemical Hazards 0675
  3. ↑ Haynes, p. 4.136
  4. ↑ Haynes, p. 4.144
  5. ↑ Takahashi, Kiyoshi; Yoshikawa, Akihiko; Sandhu, Adarsh (2007). Wide bandgap semiconductors: fundamental properties and modern photonic and electronic devices. Springer. p. 357. ISBN 978-3-540-47234-6.
  6. ↑ Haynes, p. 4.152
  7. ↑ Haynes, pp. 5.3, 5.16
  8. ↑ Zinc oxide. Chem.sis.nlm.nih.gov. Retrieved on 2015-11-17.
  9. ↑ a b c "Zinc oxide". Immediately Dangerous to Life and Health. National Institute for Occupational Safety and Health (NIOSH).
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