Description
Specifications Table
Product Name – Cesium chloride, UltraDry™, 99.99% (metals basis)
Quantity/Pack Size – 250g, 50g, 10g
Form – Crystalline powder
Grade – UltraDry™ (99.99% metals basis, anhydrous)
Application – Density gradient centrifugation, molecular biology, analytical chemistry
Product Overview
Cesium chloride, UltraDry™ grade, delivers 99.99% purity on a metals basis, ensuring exceptional performance in applications where trace metal contamination and moisture must be rigorously controlled. This anhydrous, crystalline powder is processed under stringent conditions to eliminate residual water and metallic impurities, making it ideal for high-sensitivity protocols. The UltraDry™ designation guarantees a moisture content of less than 0.01%, preventing hydrolysis or degradation during storage or use. Its high density (3.989 g/cm³ at 25°C) and solubility in water (182 g/100 mL at 0°C) provide consistent results in density gradient separations, while its low hygroscopicity enhances stability in humid lab environments. The product is packaged in airtight, argon-flushed containers to preserve purity, with each batch tested for heavy metals (Pb, Fe, Ni, Cr) to meet ACS specifications. Compatible with glass, polypropylene, and PTFE labware, it avoids leaching or reactivity issues common with lower-grade salts. For researchers requiring ultra-high purity, this grade eliminates background interference in spectroscopic, chromatographic, or electrophoretic techniques.
FAQs
1. What is the difference between UltraDry™ and standard cesium chloride?
The UltraDry™ grade undergoes additional drying and purification steps to achieve 99.99% metals basis purity and moisture levels below 0.01%, whereas standard grades may contain up to 0.5% moisture and higher trace metal content.
2. Can this be used for DNA density gradient centrifugation?
Yes, the high purity and low moisture content make it suitable for forming stable density gradients required for DNA or RNA separation without introducing contaminants.
3. Is this product compatible with plastic labware?
It is compatible with polypropylene and PTFE but may react with certain polymers over prolonged contact. Glass or PTFE-lined containers are recommended for long-term storage.
4. How should this be stored to maintain purity?
Store in the original airtight container at room temperature, away from direct light and moisture. Avoid exposure to air, as it can absorb humidity over time.
5. Are there lower-purity alternatives available for general lab use?
For applications not requiring ultra-high purity, standard ACS-grade cesium chloride (99.9%) is available, though it may contain higher moisture and trace metal levels.
