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637238

Sigma-Aldrich

二氧化硅

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

别名:

二氧化硅

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50 G
$263.00
250 G
$802.00
500 G
$1,250.00

$263.00

国内现货，预计发货时间2025年4月21日详情

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50 G
$263.00
250 G
$802.00
500 G
$1,250.00

About This Item

线性分子式:
SiO2
CAS号:
7631-86-9
分子量:
60.08
EC 号:
231-545-4
MDL编号:
MFCD00011232
UNSPSC代码:
12352302
PubChem化学物质编号:
24882839
NACRES:
NA.23

$263.00

国内现货，预计发货时间2025年4月21日详情

获取大包装报价

质量水平

100

方案

99.5% trace metals basis

表单

nanopowder

粒径

10-20 nm (BET)

沸点

2230 °C (lit.)

mp

>1600 °C (lit.)

密度

2.2-2.6 g/mL at 25 °C

堆积密度

0.011 g/mL

SMILES字符串

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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相关类别

一般描述

二氧化硅纳米粒子的折射率类似于聚合物涂层，因此它在纳米复合材料的制备中具有多种应用。热阻、电学和机械性能方面都得到了增强。[1]二氧化硅纳米粒子可用于多种催化剂、颜料稳定、电子和传感器等领域。

应用

二氧化硅纳米粒子已被用于：
  • 研究SiO2纳米复合材料在弱光条件下的非线性光学性质。[2]
  • 作为纳米复合海藻酸钙纤维中的纳米添加剂。[3]
  • 作为液体聚甲基硅氧烷中的分散剂，其在低强度可见辐射场中表现出独特的光学非线性。[2]

储存分类代码

11 - Combustible Solids

WGK

nwg

闪点(°F)

Not applicable

闪点(°C)

Not applicable

个人防护装备

dust mask type N95 (US), Eyeshields, Gloves

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
MKCV7195
MKCW8937
MKCT2066
MKCS1812
MKCQ2570

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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)
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)
Nanocomposite calcium alginate fibres containing SiO2 and bioglass
Bogun M, et al.
Spine, 12, 18-18 (2010)
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
Graham J Edgar et al.
Nature, 506(7487), 216-220 (2014-02-07)
In line with global targets agreed under the Convention on Biological Diversity, the number of marine protected areas (MPAs) is increasing rapidly, yet socio-economic benefits generated by MPAs remain difficult to predict and under debate. MPAs often fail to reach
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Questions

1–10 of 13 Questions  

  1. 구 모양의 파티클 인가요? O < == 이런 모양 일까요?

    1 answer

    1. This product is not specified to be spherical. If a spherical nanoparticle is required, product 637246 would be the best option.

      Helpful?

  2. 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?

  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. 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?

  5. ¿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?

  6. 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.

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  7. 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?

  8. 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

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  9. Does this product contain hydroxyl groups?

    1 answer

    1. We have not determined the presence of OH groups in this product, but it seems likely.  One can do FT-IR analysis on this product.

      Helpful?

  10. Is Product 637238, Silica,crystalline?

    1 answer

    1. Our information indicates that product 637238 is amorphous.

      Helpful?

1–10 of 13 Questions  

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