Description
Specifications Table
Product Name – Ammonium purpurate (murexide) Indicator
Quantity/Pack Size – 5 g
Form – Powder
Grade – Laboratory Reagent
Application – Complexometric titrations, calcium/magnesium detection
Product Overview
Ammonium purpurate, commonly known as murexide, is a highly sensitive metallochromic indicator widely used in complexometric titrations. This laboratory-grade powder exhibits a distinct color change from violet to blue in the presence of metal ions, making it ideal for detecting calcium, magnesium, and other alkaline earth metals. Its stability under standard lab conditions ensures reliable and reproducible results, even in trace-level analyses. The reagent is chemically pure, free from interfering impurities, and optimized for use in EDTA titrations. With a sharp endpoint transition, it minimizes subjective errors, enhancing accuracy in quantitative determinations. The fine particle size ensures rapid dissolution and uniform dispersion in aqueous solutions. Compatible with standard lab protocols, this indicator is a staple in analytical chemistry for its precision and ease of use. Store in a cool, dry place to maintain its efficacy over extended periods.
FAQs
1. What is the shelf life of murexide indicator?
When stored in a tightly sealed container away from light and moisture, murexide indicator retains its stability for up to 24 months from the date of manufacture.
2. Can this indicator be used for non-aqueous titrations?
Murexide is primarily designed for aqueous solutions. For non-aqueous systems, alternative indicators like Eriochrome Black T may be more suitable depending on the solvent and analyte.
3. How does murexide compare to other metal ion indicators?
Murexide offers higher sensitivity for calcium and magnesium compared to indicators like Calcon or Patton-Reeder, but its pH range is narrower (pH 10–12). Choose based on your specific titration conditions.
4. What precautions should be taken while handling this powder?
Wear gloves and a lab coat to avoid skin contact, as the dye can stain. Work in a well-ventilated area, and avoid inhaling the fine particles to prevent respiratory irritation.
5. Is this indicator compatible with automated titration systems?
Yes, murexide can be used in automated setups, but ensure the system’s optical sensors are calibrated for its violet-to-blue transition wavelength (~520–580 nm).
