Description
Specifications Table
Product Name – Potassium dichromate, 0.0167 mol/L AVS TITRINORM® volumetric solution
Quantity/Pack Size – 2.5 L
Form – Liquid (aqueous solution)
Grade – Analytical Volumetric Standard (AVS)
Application – Redox titrations, oxidizing agent in volumetric analysis
Product Overview
This 0.0167 mol/L potassium dichromate volumetric solution from the AVS TITRINORM® series represents the gold standard for redox titrations in analytical laboratories. Formulated with ultra-pure potassium dichromate (K₂Cr₂O₇) dissolved in deionized water, this ready-to-use solution eliminates the need for time-consuming weighing and dissolution procedures while maintaining exceptional accuracy. The concentration is precisely standardized against primary reference materials with NIST-traceable certification, ensuring ±0.1% accuracy in titration results. Packaged in a 2.5-liter HDPE container with a tamper-evident seal, the solution remains stable for up to 24 months when stored properly. Its deep orange-red color serves as a built-in indicator for redox reactions, particularly effective in determining iron content, organic matter oxidation, and other redox-active analytes. The AVS certification guarantees batch-to-batch consistency, making it ideal for quality control applications where reproducibility is critical. The solution’s low heavy metal content (<1 ppm) and absence of chloride ions prevent interference in sensitive analytical procedures.
FAQs
1. How should I verify the concentration of this potassium dichromate solution before use?
While the solution comes pre-standardized, you can verify the concentration by titrating against a primary standard like sodium oxalate or arsenic trioxide using standard redox titration procedures with diphenylamine as an indicator.
2. What materials are compatible with this solution for long-term storage?
The solution is best stored in its original HDPE container or transferred to glass bottles with PTFE-lined caps. Avoid metal containers as the dichromate may react with some metals over time.
3. Can this solution be diluted for lower concentration requirements?
Yes, the solution can be accurately diluted using Class A volumetric glassware and deionized water. Remember to recalculate the new molarity based on your dilution factor.
4. What safety precautions should be taken when handling this solution?
Potassium dichromate is a strong oxidizer and potential carcinogen. Always wear nitrile gloves, safety goggles, and work in a fume hood. Neutralize spills with sodium thiosulfate solution.
5. How does the AVS TITRINORM certification differ from regular analytical grade?
AVS TITRINORM solutions undergo additional quality control steps including multiple-point standardization against NIST-traceable references, tighter tolerance limits (±0.1% vs ±0.5%), and documented stability testing under various conditions.
