These beads will look the same once saturated with moisture, as they do not include a moisture indicator. It would need to be observed via moisture breakthrough analysis, depending upon the application. 4A molecular sieves such as these can uptake approximately 20% moisture so if they are being used to adsorb moisture from a chemical or stream with a known water content, one could calculate the amount of sieves needed, and regenerate once saturation is reached. Regeneration is typically performed under a nitrogen gas stream for a few hours at ~250-300C.
1.05708
Molecular sieve
0.4 nm, beads ~ 2 mm / ~ 10 mesh Reag. Ph Eur
Synonym(s):
Molecular sieve 0.4 nm, Sodium aluminium silicate
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| Size/SKU | Availability | Price |
|---|---|---|
250 g | Check Cart for Availability | $157.00 |
1 kg | Check Cart for Availability | $340.00 |
10 kg | Check Cart for Availability | $2,730.00 |
About This Item
CAS Number:
MDL number:
UNSPSC Code:
41123003
NACRES:
NB.21
EC Index Number:
215-283-8
Product Name
Molecular sieve 0.4 nm, beads ~ 2 mm / ~ 10 mesh Reag. Ph Eur
agency
reag. Ph. Eur.
Quality Segment
form
beads
particle size
~10 mesh, ~2 mm
pore size
0.4 nm
pH
8-11 ( in H2O)
mp
>1600 °C
bulk density
700‑750 kg/m3
storage temp.
no temp limit
SMILES string
[Si](=O)=O.[Al](=O)O[Al]=O
InChI key
HNPSIPDUKPIQMN-UHFFFAOYSA-N
General description
Molecular sieve 0.4 nm is a porous solid that can be used in desiccators and drying tubes to dry gases and absolute solvents.
Application
Molecular sieve 0.4 nm can be used as a catalyst:
- For the conversion of epoxides to thiiranes by treating with thiourea.
- In the solvent-free acetylation of eugenol with acetic anhydride to synthesize eugenyl acetate.
Features and Benefits
- Easy to use
- Chemically inert
- Non-toxic
- Dried liquids can be decanted
- High adsorption capacity
- Selective adsorption
- Reusable
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Storage Class
13 - Non Combustible Solids
WGK
nwg
Flash Point (°F)
Not applicable
Flash Point (°C)
Not applicable
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How do I know when the beads need to be regenerated? What do the beads look like when they are no longer fit for purpose?
1 answer-
Helpful?
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Hello there, How can I regenerate this product to get rid of the humidity/water? I mean the needed temperature, the time of heating, the indicator of regeneration success, and so on.
1 answer-
The maximum temperature for the thermal reactivation of silica is approximately 300°C. Heat regeneration typically requires a few hours.
Helpful?
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