Aluminium oxide

This article is about aluminium(III) oxide, Al2O3. For other uses, see Aluminium oxides.
Aluminium(III) oxide
(Aluminium oxide)
Names
IUPAC name
Aluminium oxide
Systematic IUPAC name
Aluminium(III) oxide
Other names
Dialuminium trioxide
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard 100.014.265 Edit this at Wikidata
EC Number
  • 215-691-6
RTECS number
  • BD120000
UNII
  • InChI=1S/2Al.3O/q2*+3;3*-2 checkY
    Key: PNEYBMLMFCGWSK-UHFFFAOYSA-N checkY
  • InChI=1/2Al.3O/q2*+3;3*-2
    Key: PNEYBMLMFCGWSK-UHFFFAOYAC
  • [Al+3].[Al+3].[O-2].[O-2].[O-2]
  • [O-2].[O-2].[O-2].[Al+3].[Al+3]
Properties
Al2O3
Molar mass 101.960 g·mol−1
Appearance white solid
Odor odorless
Density 3.987 g/cm3
Melting point 2,072 °C (3,762 °F; 2,345 K)[3]
Boiling point 2,977 °C (5,391 °F; 3,250 K)[4]
insoluble
Solubility insoluble in all solvents
log P 0.31860[1]
−37.0×10−6 cm3/mol
Thermal conductivity 30 W·m−1·K−1[2]
nω = 1.768–1.772
nε = 1.760–1.763
Birefringence 0.008
Structure
Trigonal, hR30
R3c (No. 167)
a = 478.5 pm, c = 1299.1 pm
octahedral
Thermochemistry
50.92 J·mol−1·K−1[5]
−1675.7 kJ/mol[5]
Pharmacology
D10AX04 (WHO)
Hazards
GHS labelling:
GHS07: Exclamation mark
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
0
0
0
Flash point Non-flammable
NIOSH (US health exposure limits):
PEL (Permissible)
 OSHA 15 mg/m3 (total dust)
OSHA 5 mg/m3 (respirable fraction)
ACGIH/TLV 10 mg/m3
REL (Recommended)
 none[6]
IDLH (Immediate danger)
 N.D.[6]
Related compounds
Other anions
 aluminium hydroxide
aluminium sulfide
aluminium selenide
Other cations
 boron trioxide
gallium(III) oxide
indium oxide
thallium(III) oxide
Supplementary data page
Aluminium oxide (data page)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Aluminium oxide (or aluminium(III) oxide) is a chemical compound of aluminium and oxygen with the chemical formula Al2O3. It is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium oxide. It is commonly called alumina and may also be called aloxide, aloxite, or alundum in various forms and applications. It occurs naturally in its crystalline polymorphic phase α-Al2O3 as the mineral corundum, varieties of which form the precious gemstones ruby and sapphire. Al2O3 is used to produce aluminium metal, as an abrasive owing to its hardness, and as a refractory material owing to its high melting point.[7]

  1. ^ "Aluminum oxide_msds".
  2. ^ Cite error: The named reference properties was invoked but never defined (see the help page).
  3. ^ Patnaik, P. (2002). Handbook of Inorganic Chemicals. McGraw-Hill. ISBN 978-0-07-049439-8.
  4. ^ Raymond C. Rowe; Paul J. Sheskey; Marian E. Quinn (2009). "Adipic acid". Handbook of Pharmaceutical Excipients. Pharmaceutical Press. pp. 11–12. ISBN 978-0-85369-792-3.
  5. ^ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. ISBN 978-0-618-94690-7.
  6. ^ a b NIOSH Pocket Guide to Chemical Hazards. "#0021". National Institute for Occupational Safety and Health (NIOSH).
  7. ^ "Alumina (Aluminium Oxide) – The Different Types of Commercially Available Grades". The A to Z of Materials. 3 May 2002. Archived from the original on 10 October 2007. Retrieved 27 October 2007.