Description
Specifications Table
Product Name – Sodium thiosulfate solution, N/10 CVS
Quantity/Pack Size – 6 ampoules x 10 mL
Form – Liquid (Aqueous Solution)
Grade – CVS (Certified Volumetric Solution)
Application – Redox titrations, iodine titrations, chlorination studies
Product Overview
This N/10 Sodium Thiosulfate Solution is a standardized volumetric reagent designed for high-precision redox titrations in laboratory settings. Formulated as a clear, colorless aqueous solution, it maintains exceptional stability when stored properly, ensuring consistent performance across multiple analytical procedures. The CVS (Certified Volumetric Solution) grade guarantees accurate molar concentration, eliminating the need for additional standardization in most applications. Each 10 mL ampoule is sealed to prevent contamination and oxidation, preserving the reagent’s integrity until use. The solution is prepared using ultra-pure sodium thiosulfate pentahydrate dissolved in deionized water, with stabilizers added to prevent bacterial growth and decomposition. Its neutral pH and absence of heavy metal impurities make it particularly suitable for sensitive titrimetric analyses where trace contaminants could interfere with results. The 6-ampoule pack provides convenient single-use portions, minimizing waste and cross-contamination risks in shared laboratory environments. This solution demonstrates excellent compatibility with standard glassware and most titration setups, though users should verify compatibility with specific indicator systems.
FAQs
1. What is the exact molarity of this N/10 Sodium Thiosulfate Solution?
The solution is standardized to 0.1000 N ± 0.5% as sodium thiosulfate, with the exact normality verified through potentiometric titration against primary standard potassium dichromate during quality control.
2. Can this solution be used directly for iodine titrations without further dilution?
Yes, the N/10 concentration is optimal for most iodine titrations involving standard sample sizes. For micro-scale analyses, you may need to use smaller aliquots or consider our N/50 concentration option.
3. What materials are the ampoules made from and are they autoclavable?
The ampoules are manufactured from Type I borosilicate glass that meets USP/EP standards. While they can withstand typical autoclave cycles, we recommend against autoclaving as the solution is provided sterile and ready for use.
4. How does the CVS grade differ from regular laboratory grade sodium thiosulfate?
CVS grade solutions undergo additional purification steps and are certified for volumetric accuracy, with each batch accompanied by a certificate of analysis detailing the exact normality and trace impurity levels, unlike general laboratory grade reagents.
5. What’s the typical shelf life when stored under recommended conditions?
When stored unopened at 15-25°C away from direct sunlight, the solution maintains its certified normality for 12 months from the date of manufacture, as indicated on the ampoule label.
