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637238

Sigma-Aldrich

Sílica

nanopowder, 10-20 nm particle size (BET), 99.5% trace metals basis

Sinônimo(s):

Dióxido de silício

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50 G
R$ 1.021,00
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50 G
R$ 1.021,00
250 G
R$ 4.075,00
500 G
R$ 6.110,00

About This Item

Fórmula linear:
SiO2
Número CAS:
7631-86-9
Peso molecular:
60.08
Número CE:
231-545-4
Número MDL:
MFCD00011232
Código UNSPSC:
12352302
ID de substância PubChem:
24882839
NACRES:
NA.23

R$ 1.021,00

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Nível de qualidade

100

Ensaio

99.5% trace metals basis

Formulário

nanopowder

tamanho de partícula

10-20 nm (BET)

p.e.

2230 °C (lit.)

pf

>1600 °C (lit.)

densidade

2.2-2.6 g/mL at 25 °C

densidade volumétrica

0.011 g/mL

cadeia de caracteres SMILES

O=[Si]=O

InChI

1S/O2Si/c1-3-2

chave InChI

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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Descrição geral

The refractive index of silica nanoparticles is similar to polymeric coatings, so it finds several applications in the preparations of nanocomposites. Properties suh as, thermal resistance, electrical and mechanical are enhanced.[1] Silica nanoparticles find uses in various fields of catalysts, pigment stabilization, electronics and sensors.

Aplicação

Silica nanoparticles have been used :
  • To study the nonlinear optical properties of SiO2 nanocomposites in weak optical fields.[2]
  • As a nanoadditive in nanocomposite calcium alginate fibers.[3]
  • As dispersant in liquid polymethylsiloxane to exihibit unique optical non linearity in low intensity visible radiation fields.[2]

Código de classe de armazenamento

11 - Combustible Solids

Classe de risco de água (WGK)

nwg

Ponto de fulgor (°F)

Not applicable

Ponto de fulgor (°C)

Not applicable

Equipamento de proteção individual

dust mask type N95 (US), Eyeshields, Gloves

Escolha uma das versões mais recentes:

Certificados de análise (COA)

Lot/Batch Number
MKCV7195
MKCW8937
MKCT2066
MKCS1812
MKCQ2570

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Areia, quartzo branco ~99%, 0.5-10 μm (approx. 80% between 1-5 μm)

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Areia, quartzo branco

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Óxido de alumínio nanopowder, 13 nm primary particle size (TEM), 99.8% trace metals basis

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Óxido de alumínio

Unusual nonlinear optical properties of SiO2 nanocomposite in weak optical fields
Milichko VA, et al.
Applied Physics. A, Materials Science & Processing, 111(1), 319-322 (2013)
Nanocomposite calcium alginate fibres containing SiO2 and bioglass
Bogun M, et al.
Spine, 12, 18-18 (2010)
APS-silane modification of silica nanoparticles: effect of treatm,ent's variables on the grafting content and colloidal stability of nanoparticles
Journal of Coatings Technology and Research, 11(4), 651-660 (2014)
Saisai Wei et al.
The international journal of biochemistry & cell biology, 113, 95-102 (2019-06-21)
ZnO nanoparticle (ZnO NP) exposure causes oxidative stress in the respiratory system, leading to pulmonary damage. Activating transcription factor 3 (ATF3) participates in a variety of cellular stress responses. However, the role of ATF3 in ZnO NP genotoxicity and cytotoxicity
Yaswanth Kuthati et al.
Journal of nanoscience and nanotechnology, 13(4), 2399-2430 (2013-06-15)
The advent of Nanotechnology has paved a way for improved disease treatment strategies, the most noteworthy being the mesoporous silica nanoparticles (MSNs) which have gained much recent attention in the field of cancer therapy and its diagnosis. The flaws of
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Questions

1–10 of 12 Questions  

  1. What is the surface area of ​​this product according to BET?

    1 answer

    1. The surface area of this material is not determined on a lot to lot basis. However, historical data indicate a specific surface area range of 25 - 50 m2/g.

      Helpful?

  2. 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?

  3. 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?

  4. ¿Do you offer silica nanoparticles for impermeabilization of textile? We bought this product last year: silica nanopowder, 10-20 nm particle size (BET), 99.5% trace metals basis ref. 637238 - but it didn´t work for that application

    1 answer

    1. There are several silica nanoparticles offered, however, these are not specifically for the coating of textiles.
      The products below may or may not be suitable for the specified application:
      https://www.sigmaaldrich.com/product/aldrich/748161
      https://www.sigmaaldrich.com/product/aldrich/637246
      https://www.sigmaaldrich.com/product/aldrich/718483

      Helpful?

  5. what is BET? abbreviation of BET?

    1 answer

    1. BET stands for Brunauer-Emmett-Teller. It is a surface analysis technique used to measure specific surface area, pore size distribution, and particle size.

      Helpful?

  6. What is the shelf life (useful life) of Silicon dioxide (637246-50G) nano powder having CAS No. 7631-26-9

    1 answer

    1. This product does not contain an expiration date or recommended retest date. Products with no expiration date or recommended retest date should be routinely inspected by customers to ensure they perform as expected. These products are also subject to a one year warranty from the date of shipment. For more information you may access the "Product Dating Information" document under "ADDITIONAL USEFUL DOCUMENTS ABOUT OUR PRODUCTS" at the bottom of the Quality Services page with this link: https://www.sigmaaldrich.com/life-science/quality-and-regulatory-management/quality-services

      Helpful?

  7. I need food-grade silicon dioxide. is it available or not?

    1 answer

    1. We do not offer a food-grade silicon dioxide. However, we do offer a pharmaceutical grade silicon dioxide that can be used for food grade applications. Please see this product: https://www.sigmaaldrich.com/product/mm/113126.

      Our food grade items reside in our flavors and fragrance portfolio and will typically start with a "W" in the product code. To look into the food grade products we offer please see this link to our flavors and fragrance product portfolio: https://www.sigmaaldrich.com/products/chemistry-and-biochemicals/flavors-and-fragrances?country=US&language=en&cmsRoute=products&cmsRoute=chemistry-and-biochemicals&cmsRoute=flavors-and-fragrances&page=1&searched=Silicon+dioxide

      Helpful?

  8. Have any papers cited use of Product 637238, Silica?

    1 answer

    1. One publication has specifically mentioned use of product 637238, in environmental research.

      Helpful?

  9. 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?

  10. Is Product 637238, Silica,crystalline?

    1 answer

    1. Our information indicates that product 637238 is amorphous.

      Helpful?

1–10 of 12 Questions  

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