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420786

Sigma-Aldrich

LUDOX® TM-40 colloidal silica

40 wt. % suspension in H2O

Synonym(s):

Silica preparation

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About This Item

Linear Formula:
SiO2
CAS Number:
7631-86-9
Molecular Weight:
60.08
MDL number:
MFCD00011232
UNSPSC Code:
12352309
PubChem Substance ID:
24866350
NACRES:
NA.22
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description

colloidal

form

liquid

concentration

40 wt. % suspension in H2O

surface area

~140 m2/g

pH

9.0

density

1.3 g/mL at 25 °C

storage temp.

2-8°C

SMILES string

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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Application

LUDOX® TM-40 colloidal silica has been used:
  • As a colloidal silica template for the synthesis of carbon nanocapsules.[1]
  • In the synthesis of conducting nanocomposite polymer foams (hybrid of carbon black/silica/polymer) used as gas sensors.[2]
  • As a silicon source for the synthesis of Zwitterion-stabilized silica nanoparticles. [3]
  • As a silicon source for the fabrication of transparent superhydrophilic/superhydrophobic silica nanoparticulate thin films.[4]
  • In the synthesis of microporous titanosilicate ETS-10 used as a catalyst in Knoevenagel condensation reaction.[5]

Legal Information

LUDOX is a registered trademark of W.R. Grace & Co.-Conn.

Storage Class Code

12 - Non Combustible Liquids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCV4430
MKCQ9067
MKCQ9068
MKCP5060
MKCM6538

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Fabrication and characterization of transparent superhydrophilic/superhydrophobic silica nanoparticulate thin films
Lin Y-H, et al.
Thin Solid Films, 519(16), 5450-5455 (2011)
Selective Fabrication of Carbon Nanocapsules and Mesocellular Foams by Surface-Modified Colloidal Silica Templating
Jang J and Lim B
Advanced Materials, 14(19), 1390-1393 (2002)
Conducting nanocomposite polymer foams from ice-crystal-templated assembly of mixtures of colloids
Colard CAL, et al.
Advanced Materials, 21(28), 2894-2898 (2009)
Liquid-phase Knoevenagel reactions over modified basic microporous titanosilicate ETS-10
Goa Y, et al.
J. Catal., 224(1), 107-114 (2004)
Zwitterion-stabilized silica nanoparticles: toward nonstick nano
Estephan ZG, et al.
Langmuir, 26(22), 16884-16889 (2010)
View All Related Papers

Questions

1–4 of 4 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

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  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

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  3. What is the density of the silica particles themselves? 

    1 answer

    1. The density of the silica particles in this preparation is not determined. Silica dioxide products of similar particle size, such as 637238, list a density range of 2.2–2.6 g/cm3.

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  4. What is the smallest size of the silica particles?

    1 answer

    1. The Ludox products have an average particle size range of 7nm to 22nm. Please see the Ludox product comparison table below:

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