229423

Sigma-Aldrich

Aluminum oxide

powder, 99.99% trace metals basis

Synonym(s):
Alumina
Linear Formula:
Al2O3
CAS Number:
Molecular Weight:
101.96
EC Number:
MDL number:
eCl@ss:
38120402
PubChem Substance ID:
NACRES:
SB.52

Quality Level

assay

99.99% trace metals basis

form

powder

surface area

50-60 m2/g

mp

2040 °C (lit.)

SMILES string

O=[Al]O[Al]=O

InChI

1S/2Al.3O

InChI key

TWNQGVIAIRXVLR-UHFFFAOYSA-N

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storage_class_code

13 - Non Combustible Solids

WGK Germany

nwg

Flash Point F

Not applicable

Flash Point C

Not applicable

Certificate of Analysis

Certificate of Origin

  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  4. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  5. How is the purity of Product 229423, Aluminum oxide, determined?

    Product No. 229423 is tested for the amount of specific metal impurities as described on both the specification sheet and the lot specific Certificate of Analysis. Both documents are available from our website. The percent purity is based on this trace metal analysis.

  6. What is the crystalline phase of Product 229423, Aluminum oxide?

    The crystalline phase of Product No. 229423 is alpha.

  7. What other names are there for aluminum oxide, Product No. 229423?  

    Alumina oxide is also known as alumina.

  8. Is Product No. 229423, aluminum oxide, soluble in water?

    No, aluminum oxide, is not soluble in water.  However, aluminum oxide is slowly soluble in either acids or alkali.

  9. What is the particle size of the aluminum oxide, Product No. 229423?  

    Sigma does not determine the particle size of Product No. 229423. Neither is this part of our specifications. However, a vendor description for particle size for some lots in the past (including for lot MKBD5677) is the following: >100 mesh, 30%; >200 mesh, 80%; >325 mesh, 99%.

  10. What is the surface area for Product 229423, Aluminum oxide?

    Sigma does not determine the surface area of Product No. 229423, nor is this part of our specifications. However, a vendor description for surface area for some past lots (including for lot MKBD5677) is 50-60 m2/g.

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