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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:
Molecular Weight:
60.08
MDL number:
UNSPSC Code:
12352309
PubChem Substance ID:
NACRES:
NA.22

description

colloidal

Quality Level

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 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

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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The effects of gel aging on the synthesis of NaY zeolite from colloidal silica.
Ginter D M, et al.
Zeolites, 12(6), 742-749 (1992)
Synthesis of zeolite L. Tuning size and morphology.
Ruiz A Z, et al.
Monatshefte fur Chemie / Chemical Monthly, 136(1), 77-89 (2005)
Low temperature heat capacity and thermodynamic functions of anion bearing sodalites Na8Al6Si6O24X2 (X= SO4, ReO4, Cl, I)
J Schliesser, et al.
The Journal of Chemical Thermodynamics, 114, 14-24 (2017)
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)
Hydrogen production from formic acid dehydrogenation over a Pd supported on N-doped mesoporous carbon catalyst: A role of nitrogen dopant
Y Kim, et al.
Applied Catalysis A: General, 608, 117887-117887 (2020)

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