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Merck
CN

229423

Aluminum oxide

greener alternative

powder, 99.99% trace metals basis

Synonym(s):

Alumina

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About This Item

Linear Formula:
Al2O3
CAS Number:
1344-28-1
Molecular Weight:
101.96
PubChem Substance ID:
329752360
eCl@ss:
38120402
UNSPSC Code:
12352311
NACRES:
SB.52
EC Number:
215-691-6
MDL number:
MFCD00003424

Key Documents

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Product Name

Aluminum oxide, powder, 99.99% trace metals basis

InChI key

TWNQGVIAIRXVLR-UHFFFAOYSA-N

InChI

1S/2Al.3O

SMILES string

O=[Al]O[Al]=O

assay

99.99% trace metals basis

form

powder

greener alternative product characteristics

Design for Energy Efficiency
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sustainability

Greener Alternative Product

mp

2040 °C (lit.)

greener alternative category

Enabling

Quality Level

100

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Features and Benefits

Aluminum oxide has:
  • High porosity
  • High surface area
  • Acidic and basic property

Application

Aluminum oxide is used as
  • Filler for plastics and a common ingredient in sunscreen and many cosmetics.
  • As a catalyst for alcohol dehydration in the Claus process.
  • As a catalyst in the conversion of urea to ammonia.

General description

Aluminum oxide (Al2O3), also known as alumina. It is commonly used in various rubber, plastics, ceramics, and refractory materials for reinforcement hardening. It can also be used as a filler or component in polymer or inorganic composite materials, as a catalyst or catalyst support, as an adsorbent, etc.
We are committed to bringing you Greener Alternative Products, which belong to one of the four categories of greener alternatives. Aluminum oxide serves as a multifunctional additive or coating in lithium-ion batteries, helping stabilize electrode–electrolyte interfaces, suppress side reactions, improve thermal stability, and extend cycle life. By enabling safer, longer-lasting cells, it reduces material waste and energy use across the battery lifecycle. Click here for more information.

Storage Class

11 - Combustible Solids

wgk

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
MKCX7304
MKCW5153
0000282278
MKCV1862
0000282278

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  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.

  11. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Mobeen Murtaza et al.
Molecules (Basel, Switzerland), 25(18) (2020-09-26)
Water-based drilling fluids are extensively used for drilling oil and gas wells. However, water-based muds cause clay swelling, which severely affects the stability of wellbore. Due to two adsorption positions, it is expected that cationic gemini surfactants can reduce the
Dehydration of 2-butanol by a sulfated zirconia/γ-alumina mixed metal oxide catalyst inside a gas chromatograph injection port.
Skrdla PJ and Lindemann C.
Applied Catalysis A: General, 246(2), 227-235 (2003)
Thermoanalytical studies of water on activated alumina, Brockmann I-V,(acid, neutral, basic) from- 60? to+ 700? C.
Hampson JW and Bleam WF.
Thermochimica Acta, 288(1), 179-189 (1996)
Prescott R and Graham MJ.
Oxidation of Metals, 38(3-4), 233-254 (1992)
Chien-Chih Lin et al.
Nanoscale, 5(17), 8090-8097 (2013-07-25)
We demonstrated a promising route for enhancing temperature sensitivity, improving saturation voltage, and reducing power consumption of the MOS(p) tunneling temperature sensors by introducing ultrathin Al2O3 into the dielectric stacks. Detailed illustrations of the working mechanism and device concept are
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