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420840 Sigma-Aldrich

LUDOX® AS-40 colloidal silica

40 wt. % suspension in H2O

Synonym: Silica preparation

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Properties

Related Categories Chemical Synthesis, Reagents, Silica Gel, Solid Supported Synthesis, Specialty Synthesis More...
description   colloidal
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

Description

Application

Ammonium stabilizing counterion

LUDOX® AS-40 colloidal silica has been used as:
• As a silica source to develop a porous substrate for constructing thermally responsive gel-infused surface.
• A silica standard reference material for NMR calibration to determine the surface area of silica particles using solvent relaxation data.
• A silica source for developing mordenite membranes on porous α-alumina supports via seed-assisted crystallization.

Packaging

1, 4 L in poly bottle

18 L in poly drum

Legal Information

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

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
WGK 1
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles
Peer-Reviewed Papers
15

References

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