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420816

Sigma-Aldrich

LUDOX® HS-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:
24866353
NACRES:
NA.22

description

colloidal

form

viscous liquid

concentration

40 wt. % suspension in H2O

surface area

~220 m2/g

pH

9.8

density

1.3 g/mL at 25 °C

SMILES string

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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General description

LUDOX® HS-40 colloidal silica is used as a silicon (Si) source in the synthesis of zeolites, sulphate sodalite, and aluminosilicate gels.

Application

LUDOX® HS-40 colloidal silica is utilized:
  • As a template for generating mesopores
  • As an excellent binder that binds catalyst components together and provides high mechanical strength without changing catalytic properties
  • As a substrate to enhance substrate adhesion in zeolites
  • In the preparation of nitrogen-doped carbon (NMC), which serves as catalyst support

Legal Information

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

Storage Class

12 - Non Combustible Liquids

wgk_germany

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Control of the pore size distribution inside the RuO2 catalyst by using silica nanosphere particle for highly efficient water electrolysis
C Baik et al.
Microporous and Mesoporous Materials : The Official Journal of the International Zeolite Association, 309, 110567-110567 (2020)
Deposition of oriented zeolite A films: in situ and secondary growth
LC Boudreau, et al.
Journal of Membrane Science, 152, 41-59 (1999)
Optimization of process parameters on the extrusion of honeycomb shaped monolith of H-ZSM-5 zeolite
A Aranzabal, et al.
Chemical Engineering Journal, 162, 415-423 (2010)
Economical synthesis of high-silica LTA zeolites: A step forward in developing a new commercial NH3-SCR catalyst
D Jo, et al.
Applied Catalysis. B, Environmental, 243, 212-219 (2019)
The separation of cells and subcellular particles by colloidal silica density gradient centrifugation.
Wolff D A.
Methods in Cell Biology, 10, 85-104 (1975)
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