Description
Specifications Table
Product Name – Calcium Sulphate Hemihydrate 97% Extra Pure
Quantity/Pack Size – 100 g, 500 g
Form – Powder
Grade – Extra Pure (97%)
Application – Laboratory reagent, desiccant, plaster of Paris formulation
Product Overview
Calcium Sulphate Hemihydrate 97% Extra Pure is a finely milled, high-purity chemical compound designed for laboratory and technical applications where consistency and solubility are critical. This extra pure grade ensures minimal impurities, making it suitable for sensitive procedures requiring reliable reactivity. The hemihydrate form (CaSO₄·½H₂O) offers controlled hydration properties, commonly utilized in plaster of Paris production, desiccation processes, and as a reagent in chemical synthesis. Its white, odorless powder dissolves efficiently in water, providing a stable medium for precipitation reactions or as a drying agent. The 97% purity level guarantees reproducible results, while the uniform particle size enhances mixing and dispersion. Store in a tightly sealed container to prevent moisture absorption, which could alter its hemihydrate state. This product adheres to stringent quality standards, ensuring batch-to-batch reliability for research, industrial, or educational laboratory settings.
FAQs
1. What is the difference between Calcium Sulphate Hemihydrate and Anhydrous Calcium Sulphate?
Calcium Sulphate Hemihydrate contains 0.5 molecules of water per formula unit (CaSO₄·½H₂O), giving it distinct hydration properties compared to the anhydrous form (CaSO₄), which lacks water. The hemihydrate is more reactive in plaster applications due to its ability to rehydrate and harden.
2. Can this product be used for making plaster casts?
Yes, this 97% extra pure grade is suitable for plaster of Paris formulations, where it reacts with water to form a solid gypsum matrix. Ensure proper mixing ratios for optimal strength and setting time.
3. How should I store Calcium Sulphate Hemihydrate to maintain its purity?
Store in an airtight container in a cool, dry place away from moisture and direct sunlight. Exposure to humidity can convert it to the dihydrate form (gypsum), altering its properties.
4. Is this product compatible with organic solvents?
Calcium Sulphate Hemihydrate is primarily soluble in water and has limited solubility in most organic solvents. For non-aqueous applications, verify compatibility with your specific solvent system.
5. What alternatives exist for desiccation applications if this product is unavailable?
Alternatives include silica gel, anhydrous magnesium sulphate, or molecular sieves, depending on the required drying efficiency and chemical compatibility with your sample.
