Description
Specifications Table
Product Name – NAPHTHOLPHTHALEIN Indicator grade
Quantity/Pack Size – 1 g, 5 g
Form – Powder
Grade – Indicator
Application – pH indicator, titration
Product Overview
NAPHTHOLPHTHALEIN Indicator grade is a high-quality, lab-tested pH indicator widely used in analytical chemistry for precise titration and pH detection. This synthetic dye transitions from colorless in acidic solutions (pH 10), providing clear visual endpoints for accurate measurements. Its fine powder form ensures rapid dissolution and uniform distribution in aqueous solutions, making it a reliable choice for laboratory applications. The indicator-grade purity guarantees minimal interference with test results, ensuring reproducibility in experiments. Store in a cool, dry place away from direct sunlight to maintain stability. Compatible with most aqueous and alcoholic solvents, it integrates seamlessly into standard lab protocols without requiring additional preparation. For researchers and educators seeking consistent performance, this naptholphtalein variant delivers sharp color changes and long shelf life when handled under recommended conditions.
FAQs
1. What is the pH range for naptholphtalein?s color change?
It remains colorless below pH 7 and transitions to violet above pH 10, with a distinct endpoint around pH 9.8.
2. Can this indicator be used in non-aqueous titration?
While primarily designed for aqueous solutions, it may work in alcoholic solvents but requires validation for specific applications.
3. How should I store unused naptholphtalein to extend shelf life?
Keep the container tightly sealed in a cool, dark place to prevent moisture absorption and degradation from light exposure.
4. Is this grade suitable for quantitative analysis?
Yes, its high purity and consistent color transition make it ideal for quantitative titrations where precision is critical.
5. What alternatives exist for similar pH detection ranges?
Thymolphtalein (pH 9.3?10.5) or phenolphthalein (pH 8.3?10) can be alternatives, though their transition points differ slightly.
