Yes, the recommended storage temperature is 2-8°C. If the material is compromised, please reach out to the local technical service team for assistance with that issue.
420786
LUDOX® TM-40 colloidal silica
40 wt. % suspension in H2O
Synonym(s):
Silica preparation
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| Size/SKU | Availability | Price |
|---|---|---|
1 L | Available to ship TODAYfromMILWAUKEE | $69.00 |
4 L | Available to ship TODAYfromMILWAUKEE | $197.00 |
18 L | Available to ship TODAYfromMILWAUKEE | $573.00 |
About This Item
Linear Formula:
SiO2
CAS Number:
Molecular Weight:
60.08
NACRES:
NA.22
PubChem Substance ID:
UNSPSC Code:
12352309
MDL number:
description
colloidal
Quality Segment
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
Application
LUDOX® TM-40 colloidal silica has been used:
- As a colloidal silica template for the synthesis of carbon nanocapsules.
- In the synthesis of conducting nanocomposite polymer foams (hybrid of carbon black/silica/polymer) used as gas sensors.
- As a silicon source for the synthesis of Zwitterion-stabilized silica nanoparticles.
- As a silicon source for the fabrication of transparent superhydrophilic/superhydrophobic silica nanoparticulate thin films.
- In the synthesis of microporous titanosilicate ETS-10 used as a catalyst in Knoevenagel condensation reaction.
Legal Information
LUDOX is a registered trademark of W.R. Grace & Co.-Conn.
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This Item | |||
|---|---|---|---|
| description 40 wt. % suspension in H2O | description 40 wt. % suspension in H2O | description 30 wt. % suspension in H2O | description 34 wt. % suspension in H2O |
| surface area ~140 m2/g | surface area ~220 m2/g | surface area ~220 m2/g | surface area ~140 m2/g |
| form liquid | form viscous liquid | form liquid | form liquid |
| pH 9.0 | pH 9.8 | pH 9.8 | pH 4-7 |
| Quality Level 200 | Quality Level 100 | Quality Level 100 | Quality Level 100 |
| density 1.3 g/mL at 25 °C | density 1.3 g/mL at 25 °C | density 1.21 g/mL at 25 °C | density 1.23 g/mL at 25 °C |
| description colloidal | description colloidal | description colloidal | description colloidal |
Storage Class
12 - Non Combustible Liquids
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
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Is the preferred storage temperature really 36-46F? Ours froze in that range and seemed to ruin the material. I'm reluctant to store my new container in the same way when it seems perfectly fine at room temperature.
1 answer-
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
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/418/501/product-dating-information-06-25-mk.pdfHelpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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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What is the density of the silica particles themselves?
1 answer-
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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What is the smallest size of the silica particles?
1 answer-
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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