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688363 Sigma-Aldrich

Molecular sieves, 4 Å

powder, activated, −325 mesh particle size

Synonym: SYLOSIV® A4, Sodium Alumino-Silicate

  • CAS Number 70955-01-0

  • Linear Formula Na12[(AlO2)12(SiO2)12] · xH2O

  •  MDL number MFCD00147627

  •  eCl@ss 32110204

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Properties

Related Categories Adsorbents, Filter Aids and Drying Agents, Essential Chemicals, Molecular Sieves, Research Essentials
Quality Level   100
form   powder
particle size   −325 mesh
pore size   4 Å

Description

General description

Molecular sieves are made up of three dimensional interconnecting networks of silica and alumina tetrahedral. These crystalline metal aluminosilicates have uniform cavities to selectively adsorb specific size molecules. A 4A molecular sieve has an effective pore size of 4Å.

Packaging

1 kg in poly bottle

2.5 kg in poly drum

25, 500 g in poly bottle

Application

Molecules with an effective diameter of 4 Å, including H2O, H2S, CO2, SO2, C2H4 and C3H6 are adsorbed.

Legal Information

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

Safety & Documentation

Safety Information

Symbol 
GHS07  GHS07
Signal word 
Warning
Hazard statements 
Target organs 
Respiratory system
RIDADR 
NONH for all modes of transport
WGK Germany 
WGK 3
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

Related Content

Particle Size Conversion Table

Large sieve openings (1 in. to 1/4 in.) have been designated by a sieve "mesh" size that corresponds to the size of the opening in inches. Small sieve "mesh" sizes of 3 1/2 to 400 are designated by t...

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