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MilliporeSigma

420794

LUDOX® SM colloidal silica

30 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
NACRES:
NA.22
PubChem Substance ID:
24866351
UNSPSC Code:
12352309
MDL number:
MFCD00011232

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Product Name

LUDOX® SM colloidal silica, 30 wt. % suspension in H2O

InChI

1S/O2Si/c1-3-2

SMILES string

O=[Si]=O

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

description

colloidal

form

liquid

concentration

30 wt. % suspension in H2O

surface area

320-400 m2/g

pH

9.7-10.3

density

1.22 g/mL at 25 °C

Quality Level

100

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Show Differences

1 of 4

This Item
420875420840420778
LUDOX® SM colloidal silica 30 wt. % suspension in H2O

Sigma-Aldrich

420794

LUDOX® SM colloidal silica

LUDOX® AM colloidal silica 30 wt. % suspension in H2O

Sigma-Aldrich

420875

LUDOX® AM colloidal silica

LUDOX® AS-40 colloidal silica 40 wt. % suspension in H2O

Sigma-Aldrich

420840

LUDOX® AS-40 colloidal silica

LUDOX® TM-50 colloidal silica 50 wt. % suspension in H2O

Sigma-Aldrich

420778

LUDOX® TM-50 colloidal silica

description

colloidal

description

colloidal

description

colloidal

description

colloidal

form

liquid

form

liquid

form

liquid

form

viscous liquid

concentration

30 wt. % suspension in H2O

concentration

30 wt. % suspension in H2O

concentration

40 wt. % suspension in H2O

concentration

50 wt. % suspension in H2O

surface area

320-400 m2/g

surface area

198-250 m2/g

surface area

~135 m2/g

surface area

~140 m2/g

pH

9.7-10.3

pH

8.6-9.3

pH

9.1

pH

9.0

density

1.22 g/mL at 25 °C

density

1.21 g/mL at 25 °C

density

1.295 g/mL at 25 °C

density

1.4 g/mL at 25 °C

Application

LUDOX® SM colloidal silica has been used as a model solute to study the rejection behavior of carbon nanotube membranes.[1] It was modified with bis (1(3-trimethoxysilylpropyl)-3-methyl-imidazolium) copper tetrachloride to be used as a catalyst for the preparation of propargylamines.[2]

General description

contains sodium stabilizing counterion

LUDOX® SM colloidal silica is used in the synthesis of propargylamines.[3]

Legal Information

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

Storage Class

12 - Non Combustible Liquids

wgk

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
MKCZ1850
MKCV5423
MKCV7654
MKCR9759
MKCS9578

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Synthesis of propargylamines catalyzed by nano-colloidal silica-tethered polyhedral oligomeric silsesquioxanes with eight branches of 3-aminopropyltriethoxysilane as an efficient catalyst
Safaei-Ghomi, et al.
Main Group Metal Chemistry, 40, 129-135 (2017)
Fouling and rejection behavior of carbon nanotube membranes.
Park S M, et al.
Desalination, 343, 180-186 (2014)
Bis (1 (3-trimethoxysilylpropyl)-3-methyl-imidazolium) copper tetrachloride attached to colloidal silica nanoparticles as an efficient catalyst for the preparation of propargylamines.
Javad S G, et al.
Research on Chemical Intermediates, 43(12), 7375-7386 (2017)
David M Brown et al.
Toxicology letters, 224(1), 147-156 (2014-01-28)
We investigated the effects of silica particles and nanoparticles (NPs) (50 nm and 200 nm) with a neutral and positively charged surface when dispersed in saline, bovine serum albumin (BSA) or lung lining fluid (LLF) 24 h post instillation into
Yaswanth Kuthati et al.
Journal of nanoscience and nanotechnology, 13(4), 2399-2430 (2013-06-15)
The advent of Nanotechnology has paved a way for improved disease treatment strategies, the most noteworthy being the mesoporous silica nanoparticles (MSNs) which have gained much recent attention in the field of cancer therapy and its diagnosis. The flaws of
View All Related Papers

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/418/501/product-dating-information-06-25-mk.pdf

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  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. Hi, I am interested in your silica colloidals series. May I inquire what is the smallest size of the silica particles? Can it reach about 5 nm? Thanks you!

    1 answer

    1. The Ludox products have an average particle size range of 7nm to 22nm. There is no Ludox preparation that offers an average 5 nm particle size. Please see the Ludox product comparison table below:

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