Description
Specifications Table
Product Name – Calcium chloride (fused) LR
Quantity/Pack Size – 500 g
Form – Fused (anhydrous granules)
Grade – LR (Laboratory Reagent)
Application – Desiccant, dehydrating agent, chemical synthesis, brine solutions
Product Overview
Calcium chloride (fused) LR is a highly purified, anhydrous form of calcium chloride designed for demanding laboratory applications where moisture control and chemical precision are critical. This laboratory reagent (LR) grade ensures minimal impurities, making it suitable for sensitive experimental procedures, including desiccation, brine preparation, and as a dehydrating agent in organic synthesis. The fused granular form provides excellent solubility in water and alcohols, releasing significant heat upon dissolution—a property leveraged in exothermic reactions and cold packs. Its hygroscopic nature allows it to absorb up to 6 times its weight in water, making it a staple in humidity-controlled environments like glove boxes and storage desiccators. Unlike technical-grade variants, this LR-grade calcium chloride undergoes rigorous purification to eliminate trace metals and insoluble particles, ensuring consistency in analytical and preparative chemistry. The product is chemically stable under standard lab conditions but should be stored in airtight containers to prevent moisture absorption and caking. Compatible with most glass and plastic labware, it serves as a cost-effective alternative to molecular sieves for bulk moisture removal, though it is not recommended for applications requiring ultra-low water content (e.g., Karl Fischer titration). For optimal performance, handle in a dry atmosphere and avoid direct contact with skin or mucous membranes, as it can cause irritation due to its exothermic hydration reaction.
FAQs
1. What is the difference between fused and granular calcium chloride?
Fused calcium chloride is produced by melting and solidifying the salt into a dense, anhydrous form, whereas granular types are typically hydrated or mechanically crushed. The fused version offers higher purity, lower dusting, and better flow properties for precise lab use.
2. Can this LR-grade calcium chloride be used for food preservation?
No, this product is labeled as LR (Laboratory Reagent) grade and is not certified for food, pharmaceutical, or cosmetic applications. For edible uses, food-grade calcium chloride (E509) with appropriate certifications is required.
3. How does the hygroscopic property affect storage requirements?
The material rapidly absorbs moisture from the air, leading to clumping or dissolution if exposed. Store in a tightly sealed container with a desiccant cap, preferably in a cool, dry place below 25°C. Avoid storing near volatile chemicals or acids.
4. Is this compatible with stainless steel or aluminum lab equipment?
While calcium chloride itself is non-corrosive to stainless steel, prolonged contact with aluminum in humid conditions may cause pitting due to galvanic reactions. Use glass, HDPE, or PTFE-coated containers for long-term storage.
5. What are the signs of degradation in stored calcium chloride?
Degradation is primarily indicated by caking, discoloration (yellowing), or the presence of liquid brine at the container’s bottom. These suggest moisture contamination, which reduces its effectiveness as a desiccant or reagent.
