Silica Gel yellow/blue, 2.5 kg
Melting point (mp) >1700 °C
CAS No. [7631-86-9]
excl. VAT. | 2.5 kg per Pack Qty.
Art. No. 3650.3
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Alternative product: environmentally friendly silica gel.
- Patented, organic humidity indicator - heavy metal free
- Reversible colour change
Silica Gel yellow/blue 2.5-6 mm, with indicator, fractured
- Regeneration at 120 °C for approx. 4 hours
- Adsorptive capacity: at 90 % rel. humidity approx. 34 wt%
- Colour change from yellow to blue
|Regeneration||120 °C, approx. 4 hours|
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Desiccants can absorb water and bind it chemically (reversibly or irreversibly) or physically. The main desiccants can be subdivided into four categories:
- non-renewable chemical desiccants
- renewable chemical desiccants
- silica gels
- molecular sieves
|Acetic acid anhydride||-||-||+||-|
|Acetic acid ethyl ester||4 Å||+||-||+|
|Acetic acid methyl ester||4 Å||+||-||+|
|Diisopropyl ether||4 Å||-||+||-|
|Dimethyl formamide||4 Å||-||-||-|
|Xylene (Isomer compound)||4 Å||-||+||-|
Silica gels protect moisture sensitive goods or chemicals during storage and transport. They are suitable for drying virtually all gases and solids.
Silica gels have a broad spectrum of application in the laboratory and in technical and industrial sectors:
- Possible applications in the laboratory are in desiccators, drying towers and in absorption tubes
- In the industrial sector they are mainly used in drying plants and with various types of packaging
- Are not suitable for drying liquids and alkaline substances
In order to achieve low residual water content over the silica gel, the capacity can only be utilised partially. The less silica gel is loaded with water the more intensively it dries. For example, to achieve a residual water content of 1 mg/l the loading must not be higher than 5,2 g water / 100 g silica gel.
Is not possible for the desiccant bags, as the long fiber paper is not temperature-stable.
|Particle size||2,5-6 mm|
|20 % rel. humidity||approx. 11 Gew.-%|
|40 % rel. humidity||approx. 18 Gew.-%|
|90 % rel. humidity||approx. 34 Gew.-%|
|Filled under protective gas. Change in colour from yellow to blue. Regeneration at max. 120 °C, approx. 4 hours.|