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420840

Sigma-Aldrich

LUDOX® AS-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:
24866356
NACRES:
NA.22

description

colloidal

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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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

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

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