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

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)

MSDS

Download MSDS

COA