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199966

Sigma-Aldrich

Aluminum oxide

activated, acidic, Brockmann I

Synonyma:

Alumina

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About This Item

Lineární vzorec:
Al2O3
Číslo CAS:
1344-28-1
Molekulová hmotnost:
101.96
EC Number:
215-691-6
MDL number:
MFCD00003424
UNSPSC Code:
12352311
eCl@ss:
38120402
PubChem Substance ID:
329751965
NACRES:
SB.52

grade

Brockmann I
activated
standard grade

agency

suitable for EPA 1613

form

powder

manufacturer/tradename

CAMAG 504-C-I

technique(s)

ion chromatography: suitable

impurities

<0.03% Fe2O3
<0.03% SiO2
<0.4% Na2O

particle size

50-300 mesh

pore size

58 Å pore size

pH

4.5±0.5 ( in H2O)

mp

2040 °C (lit.)

anion traces

chloride (Cl-): ≤0.14 (mval/g)

SMILES string

O=[Al]O[Al]=O

InChI

1S/2Al.3O

InChI key

TWNQGVIAIRXVLR-UHFFFAOYSA-N

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General description

Brockmann aluminum oxides are suitable for column chromatography and adsorptive filtration.
The mechanism of formation of protective scales of α-Al2O3 (aluminum oxide) on surfaces of binary M-Al (M = Fe, Ni or Co) alloys at high temperatures has been studied. Activated aluminum oxides having different acidities and water concentrations (having Brockmann activity I-V) can easily detect various types of water (namely free water, pore water, and bound water) on the aluminum oxide present in soils.

Application

Aluminum oxide (Alumina) may be used for the removal of peroxides from the dehydration solvent (tetrahydrofuran, THF) in a protocol. Protocol involved the high resolution study of fine brain anatomy of fluorescently labeled mouse brains. 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 (acidic) can be used as an adsorbent for column chromatography. It may be used as an active surface for the acylation of aromatic ethers with carboxylic acids in the presence of trifluoroacetic anhydride under solvent-free conditions.

Storage Class

11 - Combustible Solids

wgk_germany

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

Osvědčení o analýze (COA)

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A simple, efficient, and selective method for tetrahydropyranylation of alcohols on a solid phase of alumina impregnated with zinc chloride.
Ranu BC and Saha M.
The Journal of Organic Chemistry, 59(26), 8269-8270 (1994)
Efficient Syntheses of (a-Fluoropropargyl) phosphonate Esters.
Benayoud F, et al.
The Journal of Organic Chemistry, 61(15), 5159-5164 (1996)
Micron-scale resolution optical tomography of entire mouse brains with confocal light sheet microscopy.
Silvestri L, et al.
Journal of Visualized Experiments, 80, e50696-e50696 (2013)
Conduction Characteristics of the Lithium Iodide-Aluminum Oxide Solid Electrolytes.
Liang CC.
Journal of the Electrochemical Society, 120(10), 1289-1292 (1973)
Sebastiaan P van Kessel et al.
Nature communications, 10(1), 310-310 (2019-01-20)
Human gut microbiota senses its environment and responds by releasing metabolites, some of which are key regulators of human health and disease. In this study, we characterize gut-associated bacteria in their ability to decarboxylate levodopa to dopamine via tyrosine decarboxylases.
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