11028

Aluminum oxide

puriss., ≥98% Al₂O₃ basis

• Synonym(s): Alumina
• Linear Formula: Al₂O₃
• CAS Number: 1344-28-1
• Molecular Weight: 101.96
• EC Number: 215-691-6
• MDL number: MFCD00003424
• UNSPSC Code: 12352311
• eCl@ss: 38120402
• PubChem Substance ID: 329749286

Properties

• 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 (SO₄^2-): ≤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

Description

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.[1] Polycrystalline Al₂O₃ has been employed to investigate the self-diffusion coefficient of aluminum in the temperature range of 1670°-1905°C.[2] Aluminium oxide can either be obtained via thermal conversion of aluminium hydroxide at temperatures >1200^οC or via combustion of aluminium.[3] Aluminium oxide nanoparticles can behave like safe adjuvants and carriers for eliciting antibodies from small molecules called haptens.[4]

Application

Aluminum oxide (Alumina) may be employed for the selective adsorption of the catecholamines during their determination in diverse biological matrices.[5] 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.[6] Aluminum oxide (activity II-III, according to the Brockmann scale) has been used for the chromatographic purifications.[2]

Safety Information

• Storage Class Code: 13 - Non Combustible Solids
• WGK: nwg
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable