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342890

Sigma-Aldrich

Silicon dioxide

−325 mesh, 99.5% trace metals basis

Synonyme(s) :

Cristobalite, Quartz, Sand, Silica

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100 G
103.00 CHF
1 KG
563.00 CHF

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100 G
103.00 CHF
1 KG
563.00 CHF

About This Item

Formule linéaire :
SiO2
Numéro CAS:
60676-86-0
Poids moléculaire :
60.08
Numéro CE :
262-373-8
Numéro MDL:
MFCD00011232
Code UNSPSC :
12352303
ID de substance PubChem :
24861083
Nomenclature NACRES :
NA.23

103.00 CHF

Check Cart for Availability
Devis pour commande en gros

Essai

99.5% trace metals basis

Forme

powder

Indice de réfraction

n20/D 1.544 (lit.)

Taille des particules

−325 mesh

Pf

1610 °C (lit.)

Densité

2.6 g/mL at 25 °C (lit.)

Application(s)

battery manufacturing

Chaîne SMILES 

O=[Si]=O

InChI

1S/O2Si/c1-3-2

Clé InChI

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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Catégories apparentées

Application

SiO2 is majorly used as a substrate material with excellent thermo-mechanical properties which can be used in a variety of applications which include: vapor deposition[1][2], phase deposition[3], atomic force microscopy probes(AFM)[4], spin coating[5], electronic based devices.[6]

Autres remarques

May contain adsorbed H2O and CO2 which is removable by calcining at >900°C

Code de la classe de stockage

13 - Non Combustible Solids

Classe de danger pour l'eau (WGK)

nwg

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

dust mask type N95 (US), Eyeshields, Gloves

Faites votre choix parmi les versions les plus récentes :

Certificats d'analyse (COA)

Lot/Batch Number
MKCW1671
MKCV5291
MKCT1789
MKCQ0211
MKCN2365

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Si vous avez besoin d'une version particulière, vous pouvez rechercher un certificat spécifique par le numéro de lot.

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The effect of calcination temperature on the surface microstructure and photocatalytic activity of TiO2 thin films prepared by liquid phase deposition.
Yu J, et al.
The Journal of Physical Chemistry B, 107(50), 13871-13879 (2003)
Exciton diffusion measurements in poly (3-hexylthiophene).
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Questions

1–3 of 3 Questions  

  1. 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?

  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. Is it(342890) porous silica? I want to know the specific surface area and particle size distribution(dispersity) (Batch number is MKCT1789)

    1 answer

    1. The quality specifications for product no. 342890-100G Silicon dioxide do not include a determination of its specific surface area. Our supplier does characterize the product as porous silica.

      As the Certificate of Analysis for lot MKCT1789 shows, the mean particle size is 2.08 microns. Detailed QC testing shows:
      Diameter at 10%: 0.45 microns
      Diameter at 50%: 2.06 microns
      Diameter at 90%: 3.88 microns

      Future lots of the product might vary in their particle size characteristics within the quality specification of being no larger than 45.00 microns.

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