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Molecular sieve 4 Å, 500 g

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Melting point (mp) >400 °C
WGK 1
CAS No. 1318-02-1
EG-Nr. 215-283-8

Metal-aluminium silicates for drying, cleaning or separating of liquids and gases. Spheres Ø 2,5-5,0 mm, Wear rate below 2 %.

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Art. No. 258K.1

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Molecular sieve 4 Å 

Technical Information
Storage under inert gas recommended 
Molecular sieve 4 Å
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Downloads / MSDS


General information

Molecular Sieves

For drying, cleaning or separating liquids and gases.

Properties:

  • Spherical or powdered metal aluminosilicates
  • Spheres Ø 1,6-2,5 mm and 2,5-5,0 mm
  • Active surface: 600-700 m2/g
  • Activated at 500-600 °C; we nevertheless recommend activating the molecular sieve again before using it for the first time
Application:
  • In desiccators, drying tubes, columns
  • For drying streaming gases
  • For absoluting organic solvents
  • For separating organic solvents


Regenerating:

• In drying cabinets at 200-300 °C
• Through pressure change or rinsing


Critical molecular diameter for frequently occurring molecules, in Å (1 angstrom = 10-10 m = 0.1 nm)

Molecule Size [Å]

Molecule Size [Å]
Acetylene 3.3

Helium 2.0
Ammonia 2.9

Hydrogen 2.4
Argon 3.8

Hydrogen sulphide 3.6
Benzole/toluene 5.8

Methane 3.8
n-Butanes and higher n-hydrocarbons 4.3

Methanol 3.6
i-Butane and higher i-hydrocarbons 5.1

Methyl mercaptan 3.8
i-Butene 4.0

Nitrogen 3.6
trans-2-Butene 5.1

Oxygen 3.5
1,3-Butadiene 5.8

Propane 4.3
Cyclohexane 6.0

Propylene 4.0
Carbon dioxide 3.3

Tetrahydrofurane 5.0
Carbon monoxide 3.7

Thiophene 5.3
Carbon tetrachloride 5.9

Triethylamine 7.8
Dimethylpropane 6.2

Trichlormethane/Chloroform 6.9
Ethane 4.2

Water 2.6
Ethanol 4.2

o-Xylene 6.6
Ethylene 3.9

m-Xylene 6.3
Ethyl mercaptan 3.8

p-Xylene 5.9

Certificates of Analysis

You can search for and download your certificate of analysis for the selected product here. Please provide your batch number.
The following analysis certificates have been found:

Type analysis

Globe diameter2.5-5.0 mm
H2O ads. capacity (60 % R.F)≥20 %
Loss on ignition≥1.5 %