Merck
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11028

Sigma-Aldrich

Aluminum oxide

puriss., ≥98% Al2O3 basis

Synonym(s):
Alumina
Linear Formula:
Al2O3
CAS Number:
Molecular Weight:
101.96
EC Number:
MDL number:
eCl@ss:
38120402
PubChem Substance ID:

grade

puriss.

assay

≥98% Al2O3 basis

form

solid

impurities

≤0.005% heavy metals (as Pb)
≤0.2% alkalis (as Na2O)

loss

≤0.5% loss on ignition, 1000 °C, 2 h

mp

2040 °C (lit.)

anion traces

chloride (Cl-): ≤50 mg/kg
silicate (as SiO2): ≤1000 mg/kg
sulfate (SO42-): ≤500 mg/kg

cation traces

Fe: ≤300 mg/kg

SMILES string

O=[Al]O[Al]=O

InChI

1S/2Al.3O

InChI key

TWNQGVIAIRXVLR-UHFFFAOYSA-N

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General description

Aluminum oxide (Alumina, Al2O3) is commonly used as adsorbent. Formation of protective α-Al2O3 scales on the alloys at high temperatures has been studied. Polycrystalline Al2O3 has been employed to investigate the self-diffusion coefficient of aluminum in the temperature range of 1670°-1905°C. Aluminium oxide can either be obtained via thermal conversion of aluminium hydroxide at temperatures >1200οC or via combustion of aluminium. Aluminium oxide nanoparticles can behave like safe adjuvants and carriers for eliciting antibodies from small molecules called haptens.

Application

Aluminum oxide (Alumina) may be employed for the selective adsorption of the catecholamines during their determination in diverse biological matrices. It may be used in the fabrication of polycrystalline lithium iodide ­- aluminum oxide solid electrolytes. The incorporation of aluminum oxide remarkably increased the conductivity of lithium iodide. Aluminum oxide (activity II-III, according to the Brockmann scale) has been used for the chromatographic purifications.

Storage Class Code

13 - Non Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

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Certificate of Origin

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