Skip to Content
Merck
All Photos(1)

Key Documents

208574

Sigma-Aldrich

Molecular sieves, 3 Å

beads, 4-8 mesh

Synonym(s):

Molecular Sieve UOP Type 3Å

Sign Into View Organizational & Contract Pricing


About This Item

Linear Formula:
KnNa12-n[(AlO2)12(SiO2)12] · xH2O
CAS Number:
MDL number:
UNSPSC Code:
23201100
eCl@ss:
32110204
NACRES:
NB.24

form

beads

Quality Level

particle size

4-8 mesh

pore size

3 Å

Looking for similar products? Visit Product Comparison Guide

Related Categories

General description

Molecular sieves are crystalline metal aluminosilicates having a 3-dimensional interconnecting network of silica and alumina tetrahedra. Natural water of hydration is removed from this network by heating to produce uniform cavities which selectively adsorb molecules of a specific size. The 3A form is made by substituting potassium cations for the inherent sodium ions of the 4A structure, reducing the effective pore size to ~3Å, excluding diameter >3Å, e.g., ethane. The 4 to 8-mesh type is normally used in gas-phase applications. Molecular sieves are considered a universal drying agent in polar and nonpolar media.

Application

Molecular sieves have been used for the drying of dimethyl sulfoxide.
They may also be used in the following:
  • Synthesis of ecteinascidin 743 (a potential marine-derived antitumor agent).
  • Preparation of vanillyl nonanoate (a model capsinoid compound).
  • Highly enantioselective Friedel-Crafts alkylation of indoles with nitroalkenes.
Molecular sieves, 3 Å may be used in the following processes:
  • As a general-purpose drying agent in polar and nonpolar media.
  • Commercial dehydration of unsaturated hydrocarbon streams, including cracked gas, propylene, butadiene, acetylene
  • Drying polar liquids such as methanol and ethanol.
  • Adsorption of molecules such as NH3 and H2O from a N2/H2 flow.

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Customers Also Viewed

Slide 1 of 1

1 of 1

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service