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420840

Sigma-Aldrich

LUDOX® AS-40 colloidal silica

40 wt. % suspension in H2O

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Synonym(s):
Silica preparation
Linear Formula:
SiO2
CAS Number:
7631-86-9
Molecular Weight:
60.08
MDL number:
MFCD00011232
PubChem Substance ID:
24866356

description

colloidal

Quality Level

200

form

liquid

concentration

40 wt. % suspension in H2O

surface area

~135 m2/g

pH

9.1

density

1.295 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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1 of 4

This Item
420786420859420824
LUDOX® AS-40 colloidal silica 40 wt. % suspension in H2O

Sigma-Aldrich

420840

LUDOX® AS-40 colloidal silica

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

Sigma-Aldrich

420786

LUDOX® TM-40 colloidal silica

LUDOX® TMA colloidal silica 34 wt. % suspension in H2O

Sigma-Aldrich

420859

LUDOX® TMA colloidal silica

LUDOX® HS-30 colloidal silica 30 wt. % suspension in H2O

Sigma-Aldrich

420824

LUDOX® HS-30 colloidal silica

form

liquid

form

liquid

form

liquid

form

liquid

concentration

40 wt. % suspension in H2O

concentration

40 wt. % suspension in H2O

concentration

34 wt. % suspension in H2O

concentration

30 wt. % suspension in H2O

surface area

~135 m2/g

surface area

~140 m2/g

surface area

~140 m2/g

surface area

~220 m2/g

pH

9.1

pH

9.0

pH

4-7

pH

9.8

density

1.295 g/mL at 25 °C

density

1.3 g/mL at 25 °C

density

1.23 g/mL at 25 °C

density

1.21 g/mL at 25 °C

General description

LUDOX®  AS-40 colloidal silica is used as a silica source in the preparation of zeolites.

Application

Ludox AS-40 is used as:
  • A filler material in the nanocomposite Nafion films
  • A precursor in the synthesis of micro-mesoporous carbon spheres

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

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