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Anhydrous Calcium Chloride: From Desiccant to De-icing Agent

Oct 28, 2025

Calcium chloride is a versatile inorganic compound that plays a pivotal role in countless industrial, commercial, and even agricultural processes. With its unique properties—high hygroscopicity, low freezing point, and strong water-solubility—it has become an indispensable raw material for businesses worldwide. nhydrous calcium chloride usually appears as white crystals or powder, with a high density (about 2.15 g/cm³) and melting point (about 772℃).
Applications of Anhydrous Calcium Chloride
(1) Desiccant
Anhydrous calcium chloride is widely used as a desiccant due to its strong hygroscopicity. It can absorb moisture from the air, reducing the humidity of the environment. It is commonly used in the packaging of food, pharmaceuticals, electronic devices, and so on, to prevent dampness and spoilage. For example, in food packaging, anhydrous calcium chloride can absorb moisture inside the package, extending the shelf life of the food.
(2) De - icing Agent
In winter, anhydrous calcium chloride is often used as a de - icing agent. It can lower the freezing point of ice and snow, allowing them to melt at lower temperatures. This reduces the risk of road icing and ensures traffic safety. Compared with traditional sodium chloride de - icing agents, anhydrous calcium chloride can work effectively at lower temperatures and has a smaller impact on the environment.
(3) Building Materials
Anhydrous calcium chloride also has important applications in building materials. It can be used as an accelerator for concrete, speeding up the setting time of concrete and improving construction efficiency. In addition, it can also be used to manufacture fire - proof and insulating materials, enhancing the performance and safety of building materials.
(4) Food Industry
In the food industry, anhydrous calcium chloride is used as a food additive. It can serve as a calcium supplement to fortify the calcium content in food. Moreover, it can also be used in food processing. For example, in the production of tofu, anhydrous calcium chloride acts as a coagulant, causing soy milk to coagulate into tofu.
As an important chemical substance, anhydrous calcium chloride plays a significant role in industrial production and daily life, thanks to its unique physical and chemical properties. Its applications are extensive and diverse, ranging from desiccants and de - icing agents to building materials and food additives.
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