Description
Specifications Table
Product Name – Thymolphthalein indicator powder
Quantity/Pack Size – 5 g
Form – Powder
Grade – Laboratory Grade
Application – pH indicator, titration, analytical chemistry
Product Overview
Thymolphthalein indicator powder is a highly sensitive pH indicator widely used in laboratories for detecting alkaline conditions. This synthetic dye remains colorless in acidic and neutral solutions but transitions to a distinct blue hue in alkaline environments, typically at a pH range of 9.3 to 10.5. Its sharp color change makes it an excellent choice for titration experiments, where precise endpoint detection is critical. The powder form ensures long-term stability and ease of preparation, allowing researchers to create standardized solutions as needed. As a laboratory-grade reagent, it undergoes rigorous purification to eliminate impurities, ensuring consistent and reliable results in analytical applications. The indicator’s high sensitivity to pH variations makes it particularly valuable in quantitative chemical analysis, where even minor deviations can impact experimental outcomes. Store in a cool, dry place away from direct sunlight to maintain its efficacy over extended periods.
FAQs
1. What is the exact pH range where Thymolphthalein changes color?
The indicator transitions from colorless to blue between pH 9.3 and 10.5, making it ideal for detecting weakly alkaline conditions.
2. Can this powder be used directly, or does it require dissolution?
Thymolphthalein is typically dissolved in alcohol (e.g., ethanol or isopropyl alcohol) before use to create a working solution for titrations or pH testing.
3. How should I store Thymolphthalein indicator powder to ensure longevity?
Keep the container tightly sealed in a cool, dark place to prevent moisture absorption and degradation from light exposure.
4. Is this indicator compatible with non-aqueous titrations?
Yes, Thymolphthalein can be used in non-aqueous solvents like ethanol or acetone, provided the solution remains stable under experimental conditions.
5. What alternatives exist if Thymolphthalein is unavailable for high-pH detection?
Phenolphthalein (pH 8.3–10.0) or Alizarin Yellow R (pH 10.0–12.0) can serve as substitutes, though their transition ranges differ slightly.
