Anhydrous Calcium Chloride Powder

Updated: 2026-08-05

Overview

Anhydrous Calcium Chloride Powder is an inorganic salt composed of calcium and chlorine. It is produced through the neutralization of hydrochloric acid with limestone or as a byproduct of the Solvay process. The compound is valued for its high affinity for water, making it an effective desiccant and deicing agent. In industrial settings, anhydrous calcium chloride is commonly supplied in powder or granular form. Its versatility and relatively low cost have led to widespread adoption across multiple sectors, including construction, food processing, and chemical manufacturing.

Physical and Chemical Properties

Anhydrous Calcium Chloride Powder exhibits several distinctive physical and chemical characteristics. As a hygroscopic material, it readily absorbs moisture from the environment, which can lead to clumping if not properly stored. When dissolved in water, the process is highly exothermic, releasing significant heat. The compound has a high solubility in water (74.5 g/100 mL at 20°C) and forms crystalline hydrates at lower temperatures. Its melting point of 772°C and boiling point of 1,935°C make it stable under most industrial processing conditions. These properties contribute to its effectiveness in applications requiring moisture control or heat generation.

Main Applications

The primary use of Anhydrous Calcium Chloride Powder is as a deicing agent for roads and walkways during winter months. Its ability to lower the freezing point of water makes it more effective than rock salt at lower temperatures. In construction, it serves as a concrete accelerator, reducing setting time and increasing early strength development. Other significant applications include dust control on unpaved roads, as a desiccant in industrial drying processes, and as a firming agent in food processing (E509). The oil and gas industry utilizes it in drilling fluids, while the pharmaceutical sector employs it in medicinal preparations. Its versatility ensures steady demand across multiple industries.

Safety and Storage

While Anhydrous Calcium Chloride Powder is generally considered low in toxicity, proper handling precautions are necessary. The powder can cause irritation to skin, eyes, and respiratory tract upon contact or inhalation. Workers should use appropriate personal protective equipment, including gloves, goggles, and dust masks. Storage requires attention to moisture control. The material should be kept in sealed containers or bags in a dry, well-ventilated area. Bulk storage in silos should include moisture barriers. Spills should be cleaned promptly with dry methods, as water application can create slippery surfaces and generate heat. Proper labeling and separation from incompatible materials (strong oxidizers) are essential for safe storage.

B2B Procurement Guide

When procuring Anhydrous Calcium Chloride Powder for industrial use, buyers should consider several key factors. Purity levels typically range from 94% to 97%, with higher grades commanding premium prices. Food-grade certification (FCC) is required for applications in food processing. Packaging options include 25kg bags, 1-ton bulk bags, or tanker truck deliveries for large quantities. Buyers should evaluate supplier reliability, production capacity, and transportation logistics. Seasonal demand fluctuations (particularly for deicing applications) may affect pricing and availability. Establishing long-term contracts with reputable suppliers can ensure consistent quality and competitive pricing. Testing certificates and material safety data sheets should be provided with each shipment.