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229423

Sigma-Aldrich

Óxido de alúmina

powder, 99.99% trace metals basis

Sinónimos:

Alúmina

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About This Item

Fórmula lineal:
Al2O3
Número de CAS:
1344-28-1
Peso molecular:
101.96
Número CE:
215-691-6
Número MDL:
MFCD00003424
Código UNSPSC:
12352311
eCl@ss:
38120402
ID de la sustancia en PubChem:
329752360
NACRES:
SB.52
En este momento no podemos mostrarle ni los precios ni la disponibilidad

Ensayo

99.99% trace metals basis

Formulario

powder

mp

2040 °C (lit.)

cadena SMILES

O=[Al]O[Al]=O

InChI

1S/2Al.3O

Clave InChI

TWNQGVIAIRXVLR-UHFFFAOYSA-N

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Descripción general

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.

Aplicación

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.

Características y beneficios

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

Código de clase de almacenamiento

11 - Combustible Solids

Clase de riesgo para el agua (WGK)

nwg

Punto de inflamabilidad (°F)

Not applicable

Punto de inflamabilidad (°C)

Not applicable

Elija entre una de las versiones más recientes:

Certificados de análisis (COA)

Lot/Batch Number
MKCW5153
0000282278
MKCV1862
0000282278
MKCQ5266

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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)
Prescott R and Graham MJ.
Oxidation of Metals, 38(3-4), 233-254 (1992)
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)
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
Ver todos los artículos relacionados

Questions

1–9 of 9 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

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

    1 answer

    1. 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.

      Helpful?

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

    1 answer

    1. The crystalline phase of Product No. 229423 is alpha.

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

    1 answer

    1. 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%.

      Helpful?

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

    1 answer

    1. 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.

      Helpful?

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

    1 answer

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

      Helpful?

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

    1 answer

    1. 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.

      Helpful?

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

    1 answer

    1. Alumina oxide is also known as alumina.

      Helpful?

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