Calcium Chloride Desiccant
Calcium Chloride is a versatile chemical compound widely used for de-icing, dust control, water treatment, food preservation, and more.
Calcium Chloride
- CAS Number: 10043-52-4
- EINECS NO.: 233-140-8
- Molecular Formula: CaCl2
- Purity (%): Anhydrous calcium chloride≥94%, Calcium chloride dihydrate ≥74%
- Type: food grade, industrial grade, petroleum grade
- Appearance: White, hygroscopic, flake, crystalline powder or granules.
- Packing: 25KGS/BAG
- Other Name: Calcium dichloride, Calcium(II) chloride, Calcium(2+) chloride; Calcium powder, calcium lump
Calcium Chloride Specification
| ITEMS | SPECIFICATIONS |
| CaCl2 Purity Based on CaCl2 | 94%min |
| Size | 5-20Mesh |
| Total suspended solids Based on Ca(OH)2 | 0.2% max |
| Sodium Chloride Based on NaCl | 5.0% max |
| Magnesium chloride Based on MgCl2 | 0.5% max |
| Sulphate(as CaSO4) Based on SO42- | 0.5% max |
| ITEMS | SPECIFICATIONS |
| Main content (CaCL2) | ≥74% |
| Total alkali chloride (as NaCl) | ≤5.0% |
| Magnesium Chloride(as MgCl2) | ≤0.5% |
| Water Insoluble matter | ≤0.15% |
| Alkalinity (as Ca(OH)2) | ≤0.2% |
| CaSO4 | ≤0.05% |
| Fe | ≤0.006 |
| Ph | 7.5-11 |
Key differences between Dihydrate and Anhydrous Calcium Chloride:
Water Content: Dihydrate calcium chloride (CaCl₂·2H₂O) contains two water molecules (about 20% water by weight). Anhydrous calcium chloride (CaCl₂) has no water molecules.
Purity Levels: Anhydrous has higher purity (typically ≥94% ) because it contains no water. Dihydrate usually has purity of 74-77% due to the water weight.
Moisture Absorption: Anhydrous absorbs moisture from air extremely fast — it must be kept in tightly sealed containers. Dihydrate is more stable and easier to store in normal conditions.
Heat Release: Both release heat when dissolved in water, but anhydrous produces more heat because it has no water molecules to slow the reaction.
Best Applications: Use anhydrous for high-purity needs like chemical reactions, gas drying, and lab work. Use dihydrate for de-icing, dust control, food preservation, and concrete acceleration.
Storage Requirements: Anhydrous requires extremely dry storage in sealed containers. Dihydrate is more forgiving but still needs protection from humidity.
Types of Calcium Chloride
| Feature | Powder | Flakes | Pellets |
| Dissolving Rate | Very fast | Slow | Moderate |
| Adsorption Efficiency | Maximum surface area, fastest moisture pickup | Good long-term absorption, slower initial pickup | High efficiency, good balance of speed and handling |
| Best Applications | • Laboratory drying tubes • Quick moisture removal • Chemical reactions needing fast drying | • Slow-release drying applications • Dehumidifiers • Long-term storage protection | • Container desiccants (poles, bags) • Protecting cargo during shipping • General industrial drying |
| Handling Notes | Creates dust, absorbs moisture instantly from air — must be sealed quickly | Very low dust, easy to count and dose, less mess | Low dust, good flow, easy to handle and pack |
Key Advantages of Calcium Chloride as a Desiccant
Super Absorbent Power: Calcium chloride can absorb up to 250-320% of its own weight in water. This is 10-12 times more than traditional desiccants like silica gel or clay.
Cost-Effective Protection: Due to its high capacity, you need less product to achieve the same level of protection, saving on material and logistics costs.
Prevents “Container Rain”: It aggressively removes moisture from the air inside shipping containers, lowering the dew point and preventing condensation that can damage cargo like machinery, furniture, and agricultural goods.
Safe & Easy to Use: Our calcium chloride desiccants are non-toxic and safe for use with food products. When it absorbs moisture, it turns into a gel, eliminating the risk of liquid water leakage.
Versatile Applications: Used for drying gases (like nitrogen, oxygen, hydrogen), protecting goods in transit, dehumidifying warehouses, and in laboratory desiccators.
Multiple Forms Available: We offer calcium chloride in powder, granules, and tablets to suit your specific drying process — from fast lab reactions to long-term container protection.
Calcium Chloride Uses
- De-icing and Snow Removal: Used to prevent ice and snow buildup on roads, highways, and sidewalks during winter.
- Dust Control: Applied to unpaved roads, parking lots, and construction sites to reduce airborne dust particles.
- Water Treatment: Used to adjust water hardness, control pH levels, and remove impurities.
- Food Preservation: Added as a food additive to extend the shelf life and improve firmness of certain fruits and vegetables.
- Concrete Accelerator: Added to concrete mixes to speed up the setting and hardening process, especially in cold weather.
- Desiccant and Drying Agent: Used to absorb moisture and reduce humidity in various applications.
- Oil and Gas Industry: Used in well drilling, completion fluids, and cementing.
- Pharmaceuticals: Used as a source of calcium ions in medical treatments.
FAQ of Calcium Chloride
Yes. It works effectively at temperatures down to -51°C (-60°F) , making it suitable for cold climate applications and winter shipping conditions.
Yes. Our calcium chloride desiccants are safe for contact with food products and comply with food-grade standards. It is non-toxic and DMF-free.
Container rain is condensation that forms on container walls and ceilings during temperature changes. Calcium chloride aggressively removes moisture from the air, lowers the dew point, and prevents this condensation from damaging cargo.
For a 20ft container, use 6-8 pieces of 1.4kg desiccant in summer, and 8 pieces in winter. For 40ft containers, double the quantity. Adjust based on humidity levels and transit time.
Packaging specifications: 25 kg/bag, 1 ton/bag, or as per customer requirements.
Calcium chloride must be placed in a dry, cool, well-ventilated warehouse, away from open flames and heat sources.
Calcium Chloride Desiccant Suppliers
HOO CHEMTEC: Your Trusted Calcium Chloride Desiccant Partner
We are a direct manufacturer of high-performance Calcium Chloride desiccants, providing superior moisture control solutions for industries worldwide.
Superior Absorption Performance:
Our desiccants absorb up to 300% of their own weight in moisture — 7-12 times more than silica gel. Less product, better protection.
Multiple Forms Available:
We supply powder, granules, and tablets to match your specific application — from fast lab drying to long-term container protection.
Quality You Can Trust:
Every batch is tested in our lab. Certificate of Analysis (CoA) provided with each shipment. Safe for use with food products.
Global Export Experience:
We ship worldwide with professional documentation. Moisture-proof packaging ensures your desiccant arrives ready to use.
Free Samples Available:
Contact us to request a free sample and test our performance before ordering.
Choose HOOCHEMTEC for reliable moisture control solutions.
