CAS 1344-28-1 Alumina (Gamma) Nanopowder - Materials / Alfa Chemistry

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Alumina (Gamma) Nanopowder

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Catalog Number

ACM1344281-15

CAS Number

1344-28-1

Product Name

Alumina (Gamma) Nanopowder

Structure

Category

Nanopowders

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

Alumina (Gamma) Nanopowder is a highly versatile material characterized by its fine cubic crystalline structure, distinct from other forms of aluminum oxide. Its primary purpose lies in its considerable surface area and desirable pore structure, making it exceptionally suitable for use as an adsorbent and catalyst. In adsorption processes, it effectively removes moisture and other polar molecules from gases and liquids, enhancing purity and stability in various applications, including chromatography. As a catalyst, it plays a crucial role in chemical reactions like sulfur recovery, dehydration of alcohols, and olefin isomerization. Additionally, due to its compatibility as a catalyst support in petroleum refining, Alumina (Gamma) Nanopowder serves as a foundational component in advanced industrial processes. These characteristics are attributed to the presence of active surface sites, such as hydroxyl and aluminum ions, which facilitate its multifunctional capabilities.

Color/Form

White crystalline powder;White powder, balls or lumps or various mesh

Complexity

Covalently-Bonded Unit Count

EC Number

215-691-6

Exact Mass

101.947821g/mol

Formal Charge

Heavy Atom Count

ICSC Number

0351

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

Odor

Odorless

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

Rotatable Bond Count

RTECS Number

BD1200000

UNII

LMI26O6933

Vapor Pressure

0 mm Hg (approx) (NIOSH, 2016);1 mm Hg at 2158 °C;0 mmHg (approx);0 mmHg (approx)

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