2g,5g,10g Super Dry Calcium Chloride Desiccant Packs for Boxes
Calcium chloride is a highly effective, hygroscopic desiccant used to absorb moisture and control humidity in shipping containers, industrial settings, and other applications. It absorbs moisture much faster than silica gel in high-humidity conditions, and is often formulated to turn the absorbed water into a gel to prevent leaks. Unlike silica gel, calcium chloride desiccants are typically single-use, as they are consumed when they become saturated and are not easily regenerated.
How it works
- Hygroscopic properties: Calcium chloride (CaCl2) readily absorbs moisture from the air.
- Absorption capacity: It can absorb a significant amount of water, reaching up to 600% of its weight at 85% humidity, which is much higher than silica gel.
- Physical change: As it absorbs moisture, it dissolves and can turn into a liquid or a gel, especially when combined with gelling agents.
Common uses
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Shipping and storage:
Used to prevent moisture damage, “container rain,” and mold on goods during transport.
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Industrial applications:
Employed for drying gases like nitrogen, oxygen, and hydrogen in industrial processes.
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Packaging:
Placed inside packaging for various goods, such as electronics, pharmaceuticals, and auto parts, to protect them from moisture.
Key differences from silica gel
|
Feature
|
Calcium Chloride
|
Silica Gel
|
|---|---|---|
|
Absorption capacity
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Very high, especially in humid conditions
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High, but less than calcium chloride in humid conditions
|
|
Physical change
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Turns into a liquid or gel when saturated
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Remains in solid form when saturated
|
|
Reusability
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Typically single-use
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Can be regenerated and reused by heating
|
|
Best for
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High humidity, long trips
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Low to moderate humidity
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Safety and handling
- While effective, calcium chloride can be corrosive and cause skin or eye irritation.
- When used in a container, it’s important to ensure the container is sealed to prevent leaks as the desiccant liquefies.
- Proper handling is required to avoid inhalation of dust, which can cause respiratory issues.
