The Ludox products have an average particle size range of 7nm to 22nm. Please see the Ludox product comparison table below:
420824
LUDOX® HS-30 colloidal silica
30 wt. % suspension in H2O
Synonym(s):
Silica preparation
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| Size/SKU | Availability | Price |
|---|---|---|
1 L | Available to ship TODAYfromMILWAUKEE | $71.40 |
4 L | Available to ship TODAYfromMILWAUKEE | $147.00 |
About This Item
Linear Formula:
SiO2
CAS Number:
Molecular Weight:
60.08
NACRES:
NA.22
PubChem Substance ID:
UNSPSC Code:
12352309
MDL number:
$71.40
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description
colloidal
Quality Segment
form
liquid
concentration
30 wt. % suspension in H2O
surface area
~220 m2/g
pH
9.8
density
1.21 g/mL at 25 °C
storage temp.
room temp
SMILES string
O=[Si]=O
InChI
1S/O2Si/c1-3-2
InChI key
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
General description
LUDOX® HS-40 colloidal silica is the dispersion of monodispersed colloidal silica particles having the size smaller than 100 nm. It contains sodium stabilizing counterion.
Application
LUDOX® HS-40 colloidal silica can be used:
- For the synthesis of polymer–inorganic nanocomposites by directional freezing.
- To synthesize colloidal suspensions of zeolite Y and zeolite A nanocrystals by hydrothermal method.
- As a model for colloidal silica foulants to study the membrane fouling.
Legal Information
LUDOX is a registered trademark of W.R. Grace & Co.-Conn.
1 of 1
This Item | |||
|---|---|---|---|
| description 30 wt. % suspension in H2O | description 40 wt. % suspension in H2O | description 40 wt. % suspension in H2O | description 30 wt. % suspension in H2O |
| form liquid | form viscous liquid | form liquid | form suspension |
| surface area ~220 m2/g | surface area ~220 m2/g | surface area ~135 m2/g | surface area ~230 m2/g |
| pH 9.8 | pH 9.8 | pH 9.1 | pH 4.5 |
| density 1.21 g/mL at 25 °C | density 1.3 g/mL at 25 °C | density 1.295 g/mL at 25 °C | density 1.23 g/mL at 25 °C |
| Quality Level 100 | Quality Level 100 | Quality Level 200 | Quality Level 100 |
| description colloidal | description colloidal | description colloidal | description colloidal |
Storage Class
10 - Combustible liquids
wgk
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
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What is the smallest size of the silica particles?
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How can I determine the shelf life / expiration / retest date of this product?
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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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