PORESPHERE® silica gels: Adsorb moisture & protect equipment from damage.
High adsorption capacity up to 35% / 90%
With harmless color indicators
Usable at temperatures up to 100°C
Usable at humidity levels above 10% RH
Regenerable from 120°C
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PORESPHERE® Standard - Highly efficient silica gels.
PORESPHERE® Indikator-OG
With a safe color indicator (orange - green)
Color change at 10-20% loadF
High adsorption capacity (35%)
- Structure 99% SiO2 1% copper(II) chloride
- Grain size 3-5mm
- Water absorption >370ml/kg
- Bulk density 0.78 g/ml
- Pore volume 0.35-0.45 ml/g
- Breaking strength >200N
- Specific surface area 600-800 sqm/g
- Abrasion rate <2%
- Regeneration at 120°C
PORESPHERE® Indikator-OF
With harmless color indicator (orange - colorless)
Color change at 20-25% load
High adsorption capacity (35%)
- Structure 99% SiO2 1% Ammonium iron(III) sulfate
- Grain size 3-5 mm
- Water absorption >370 ml/kg
- Bulk density 0.78 g/ml
- Pore volume 0,35-0,45ml/g
- Breaking strength >200N
- Specific surface area 600-800 sqm/g
- Abrasion rate <2%
- Regeneration at 120°C
PORESPHERE® White
Without color indicator
High adsorption capacity (35%)
Constant drying
- Structure 99% SiO2
- Grain size 0.5–1.5 mm, 1–3 mm, 3–5 mm
- Water absorption >370 ml/kg
- Bulk density 0.77 g/ml
- Pore volume 0,35-0,45ml/g
- Breaking strength >200N
- Specific surface area 650-800 sqm/g
- Abrasion rate <2%
- Regeneration at 140°C
PORESPHERE® Makro-B
Without color indicator
Very high adsorption capacity (90%)
For fluctuating conditions
- Structure 99% SiO2
- Grain Size 2-5mm
- Water absorption >900 ml/kg
- Bulk density 0.5 g/ml
- Pore volume 0.85-1.00 ml/g
- Breaking strength >200N
- Specific surface area 650-800 sqm/g
- Abrasion rate <1%
- Regeneration at 140°C
PORESPHERE® AL– An extra dose of aluminum oxide for demanding applications.
Our Poresphere® AL-range consists of silica gels with an additive of alumina (Al₂O₃) in their structure to enhace adsorption properties for:
High mechanical loads
High flow rates
Liquid water droplets
They combine the high adsorption capacity of classic silica gels with the additional stability of aluminum oxide. They are ideal for demanding drying processes that require temperature changes, high moisture loads, or chemical resistance. Their spherical structure and optimized pore size distribution ensure maximum efficiency and uniform air flow.
PORESPHERE® AL-H
Ideal for gas drying and desiccant dryers
High adsorption capacity (35%)
Fast moisture absorption
Robust structure
- Structure 96.6% SiO2 3.4% Al2O3
- Grain size 3-5 mm
- Bulk density 0.725 g/ml
- Pore volume 0,49ml/g
- Breaking strength >211N
- Specific surface area 729 sqm/g
- Abrasion rate 0.01%
- Regeneration at 140°C
PORESPHERE® AL-W (water-resistant)
Serves as protective layer
High adsorption capacity (35%)
Also adsorbs liquid water
- Structure 86.5% SiO2 13.5% Al2O3
- Grain size 3-5 mm
- Bulk density 0.749 g/ml
- Pore volume 0,42ml/g
- Breaking strength >97N
- Specific surface area 540 sqm/g
- Abrasion rate 0.03%
- Regeneration at 140°C
What makes PORESPHERE® silica gel the ideal desiccant?
High water absorption
It can bind up to 35% of its own weight in water.
Color indicator
Indicates when the maximum water absorption capacity has been reached by changing color.
Non-toxic & chemically inert
Protection against chemical reactions upon contact with other substances.
Regenerable
When silica gel is heated to over 120°C, water molecules are released again.
Narrow-pore, Typy A
PORESPHERE® Indikator + White
For environments with low to moderate humidity (<60% RH)
Available with color indicator
Wide-pore
PORESPHERE® Makro
For environments with high humidity (>60% relative humidity)
Quickly adsorb large amounts of water from humid air
Prevent damage through timely maintenance.
PORESPHERE® silica gels are available with color indicators. These indicate when the desiccant has reached its saturation point and needs to be replaced or regenerated by changing color.
At GIEBEL, we use two harmless color indicators such as copper(II) sulfate (copper salt) and iron(III) chloride (iron salt). These are organic substances that change color depending on the pH value.
Orange Green
- Color change at 10–20% load
- Strong visual contrast
- Indicator used: Copper(II) sulfate (copper salt)
Orange Colorless
- Color change at 20–25% load
- Longer service life
- Indicator used: Iron(III) chloride (iron salt)
Applications.
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FAQ - your questions, answered.
The effectiveness of silica gel depends largely on the ambient conditions, humidity, temperature, and the amount of material used. In typical packaging or storage applications, high-quality silica gel can adsorb moisture for 4 to 12 weeks at normal humidity (40–60% RH) before reaching saturation. In dry environments, it can even remain active for many months.
Silica gel is often impregnated with color indicators to visualize the saturation level reached. The color change is usually from orange to dark green, providing high contrast and reliably indicating when the material has reached its capacity.
Yes, saturated silica gel can be regenerated and reused multiple times through proper heating. Thermal regeneration reliably restores its adsorption capacity. High-quality silica gel can withstand numerous drying cycles and remains effective if properly treated. For product variants with a color indicator, the color returns after drying and once again indicates the saturation level.
The maximum moisture absorption of regular silica gel is up to 37% of its own weight. This means that 1 kg of dry silica gel can adsorb up to 370 g of water vapor from the air under optimal conditions.
If you are dealing with very high humidity levels, our wide-pore silica gel might be an option. It has a maximum capacity of up to 90%.
Blue silica gel contains hazardous cobalt(II) chloride and carries, among other things, the warning R49 - "may cause cancer by inhalation" - and is also teratogenic. Inhaling the dust, which contains heavy metals, should therefore be avoided at all costs. On October 28, 2008, the ECHA (European Chemicals Agency) re-added the substance to the candidate list of substances of very high concern (SVHC). The entry was supplemented on June 20, 2011, to include reproductive toxicity.
Orange silica gel, on the other hand, uses other substances as a color indicator and is therefore considered harmless and non-toxic to humans and the environment, making it a safer alternative.
Yes, GIEBEL holds a valid REACH certification and therefore meets all necessary requirements for the import and trade of silica gel CAS 7631-86-9.
The REACH Regulation (Registration, Evaluation, Authorisation and Restriction of Chemicals) has been in force in the European Union since June 1, 2007. This comprehensive EU chemicals regulation regulates the manufacture, import, and use of chemical substances – such as silicon dioxide (SiO₂) CAS 7631-86-9.
Yes, we offer discounts for orders above 1ton. As a bulk customer, feel free to contact us directly by phone, email, or through our contact form.