Merck
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420840

Sigma-Aldrich

LUDOX® AS-40 colloidal silica

40 wt. % suspension in H2O

Synonym(s):
Silica preparation
Linear Formula:
SiO2
CAS Number:
Molecular Weight:
60.08
MDL number:
PubChem Substance ID:

Quality Level

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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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.

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

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

Gel?Infused Slippery Surface with Enhanced Longevity and Thermally Controllable Sliding Properties.
Zhu G H, et al.
Advanced Materials Interfaces, 3(20), 1600515-1600515 (2016)
Salt enhanced solvent relaxation and particle surface area determination via rapid spin-lattice NMR.
Elliott L N, et al.
Powder Technology, 333, 458-467 (2018)
Separation of water?acetic acid mixtures by pervaporation using a thin mordenite membrane.
Li G, et al.
Separation and Purification Technology, 32(1-3), 199-206 (2003)
Yaswanth Kuthati et al.
Journal of nanoscience and nanotechnology, 13(4), 2399-2430 (2013-06-15)
The advent of Nanotechnology has paved a way for improved disease treatment strategies, the most noteworthy being the mesoporous silica nanoparticles (MSNs) which have gained much recent attention in the field of cancer therapy and its diagnosis. The flaws of
Graham J Edgar et al.
Nature, 506(7487), 216-220 (2014-02-07)
In line with global targets agreed under the Convention on Biological Diversity, the number of marine protected areas (MPAs) is increasing rapidly, yet socio-economic benefits generated by MPAs remain difficult to predict and under debate. MPAs often fail to reach

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