Calcium chloride as a hygroscopic agent - warehouse applications

Why is calcium chloride so hygroscopic?

CaCl₂ can absorb up to 6-7 times its weight in water. This happens by hydration: anhydrous CaCl₂ binds subsequent water molecules to form CaCl₂·2H₂O and then CaCl₂·6H₂O. The process is exothermic - it releases heat.

Use as a moisture absorber

• Warehouses and halls: maintaining humidity below 60% RH prevents metal corrosion and mold
• Container transport: CaCl₂ bags protect the cargo against the so-called "container rain"
• Drying of industrial gases: in industrial installations as a cheap alternative to silica gel
• Stabilization of dirt roads: absorption of water from the surface reduces dust

Comparison with other moisture absorbers

• CaCl₂: high capacity, low cost, disposable
• Silica gel: lower capacity, possibility of regeneration, more expensive
• Molecular zeolites: highest selectivity, very expensive

Order calcium chloride for industry

Saltiwa offers CaCl₂ in granules and flakes in 25 kg bags and big bags. Contact us for a B2B offer.