Catalog Number
ACM1344281-13
Product Name
Aluminum oxide, mesoporous
Category
Mesoporous Materials
Description
Aluminum oxide is a white odorless crystalline powder. Water insoluble. Properties (both physical and chemical) vary according to the method of preparation; different methods give different crystalline modifications. The variety formed at very high temperature is quite inert chemically.;DryPowder; DryPowder, OtherSolid; DryPowder, PelletsLargeCrystals; DryPowder, WetSolid; Liquid; OtherSolid; PelletsLargeCrystals; PelletsLargeCrystals, OtherSolid; WetSolid; WetSolid, Liquid;WHITE POWDER.;White, odorless, crystalline powder.;White, odorless, crystalline powder.
IUPAC Name
dialuminum;oxygen(2-)
Molecular Weight
101.961g/mol
Molecular Formula
Al2O3;Al2O3;Al2O3
Canonical SMILES
[O-2].[O-2].[O-2].[Al+3].[Al+3]
InChI
InChI=1S/2Al.3O/q2*+3;3*-2
InChI Key
PNEYBMLMFCGWSK-UHFFFAOYSA-N
Boiling Point
5396 °F at 760 mm Hg (NIOSH, 2016);2977 °C;3000 °C;5396°F;5396°F
Melting Point
3632 °F (NIOSH, 2016);2030 °C;2054 °C;3632°F;3632°F
Density
4 (NIOSH, 2016);Density: 3.4-4.0;3.97 g/cm³;4;4.0
Solubility
Insoluble (NIOSH, 2016);Difficult solubility in mineral acids and strong alkali;Insoluble in water;Solubility in water: none;Insoluble
Application
Aluminum oxide, mesoporous, is a versatile and integral material employed primarily due to its unique structural properties. As a mesoporous substance, it features a remarkably large surface area with a network of finely tailored pores, making it an exceptional adsorbent and catalyst. This characteristic structure facilitates its use in the adsorption and drying of gases and liquids, as well as in adsorption chromatography. Its catalytic capabilities, which are enhanced by surface active sites comprising OH-, O2-, and Al3+ ions, enable applications such as sulfur recovery from hydrogen sulfide, alcohol dehydration, and olefin isomerization, as well as serving as a catalyst support in petroleum refining processes. Moreover, the adaptive nature of aluminum oxide's crystalline forms and its amphoteric behavior allow for its solubility and reactivity in both acidic and basic environments, broadening its potential applications across various industrial processes. Mesoporous aluminum oxide not only fulfills critical roles in the chemical industry but also extends its utility to pharmaceutical formulations, cosmetics, and more, echoing its status as a profound multipurpose material.
Color/Form
White crystalline powder;White powder, balls or lumps or various mesh
Covalently-Bonded Unit Count
5
Exact Mass
101.947821g/mol
MeSH Entry Terms
Alumina;Alumina Ceramic;Aluminum Oxide;Aluminum Oxide (Al130O40);Aluminum Oxide (Al2O);Aluminum Oxide (AlO2);Bauxite;Ceramic, Alumina;Corundum;Oxide, Aluminum;Sapphire
Monoisotopic Mass
101.947821g/mol
Other Experimental
Very hygroscopic; an electrical insulator, electrical resistivity at 300 °C about 1.2x10+13 ohms-cm; very hard, about 8.8 on Mohs' scale; when heated above 800 °C, becomes insoluble in acid; specific gravity increases from 2.8 to 4.0 when heated above 800 °C;White powder, hexagonal; MP: 2054 °C; BP: 2977 °C; density: 3.99 g/cu cm; insoluble in water, organic solvents; slightly soluble in alkaline solutions /Alpha-alumina/;Soft white powder; transforms to corundum at 1200 °C; density: 3.97 g/cu cm; insoluble in water; soluble in acid; slightly soluble in alkaline solutions /Gamma-alumina/;Heat of formation: -130.0 kJ/mol; Gibbs energy of formation: -159.0 kJ/mol; molar entropy: 259.4 J/mol-K; molar heat capacity at constant pressure: 45.7 J/mol-K at 298.15 K;Vapor pressures: 100 Pa at 2122 °C; 1 kPa at 2351 °C; 10 kPa at 2629 °C; 100 kPa at 2975 °C;Enthalpy of fusion: 111.1 kJ/mol /Alpha-alumina/;Index of refraction: 1.7598 /alpha-alumina/; 1.7598 /gamma-alumina/;Density: 3.97 g/cu cm; Mohs' hardness: 9; index of refraction: 1.761 (alpha), 1.769 (beta) /Corundum/;Ridgeway's hardness scale: 12; Knoop hardness: 21 kN/sq m;Mean specific heat: 795.5 J/kg-K from 25-1,800 °C; thermal conductivity: 10.9 W/m-K at 500 °C, 6.2 W/m-K at 1000 °C; linear thermal expansion coefficient: 8.6/deg C X 10+6, from 20-1000 °C
Refractive Index
Index of refraction: 1.768, 1.760
Vapor Pressure
0 mm Hg (approx) (NIOSH, 2016);1 mm Hg at 2158 °C;0 mmHg (approx);0 mmHg (approx)
