Description
Specifications Table
Product Name – Eriochrome black T metal indicator powder ARS, ACS
Quantity/Pack Size – 25 g
Form – Powder
Grade – ARS, ACS
Application – Metal ion titration indicator
Product Overview
Eriochrome black T indicator powder is a high-purity, synthetic azo dye widely used as a metallochromic indicator in complexometric titrations. This ARS and ACS grade powder ensures exceptional accuracy in detecting metal ions, particularly magnesium, calcium, and other divalent cations. The indicator exhibits a sharp color change from blue to wine red at the titration endpoint, providing clear visual confirmation for precise analytical results. Its stability under standard laboratory conditions makes it a reliable choice for routine and research applications requiring consistent performance. The powder form allows for easy dissolution in aqueous or alcoholic solutions, offering flexibility in preparation. With minimal interference from common ions, this indicator delivers reproducible results across various sample matrices. The ARS and ACS certification guarantees adherence to stringent purity standards, ensuring minimal impurities that could affect titration accuracy. This product is particularly valued for its sensitivity in low-concentration metal ion detection, making it indispensable in analytical chemistry protocols.
FAQs
1. What is the shelf life of eriochrome black T indicator powder when stored properly?
When stored in a cool, dry place away from direct sunlight, the powder maintains its stability for up to 3 years from the date of manufacture.
2. Can this indicator be used for titrating hard water samples directly?
The powder can be used for hard water analysis, but the sample may require pH adjustment to 10 using ammonia buffer for optimal color transition.
3. What solvents are compatible for dissolving eriochrome black T powder?
The indicator dissolves readily in ethanol, methanol, and distilled water, with ethanol being the most common solvent for standard solutions.
4. How does the ARS grade differ from the ACS grade in this product?
Both grades meet high purity standards, but ACS grade follows American Chemical Society specifications, while ARS grade adheres to Analytical Reagent Standards.
5. What is the recommended concentration for preparing the indicator solution?
A standard solution is typically prepared at 0.1% concentration by dissolving 0.1g of powder in 100ml of ethanol or water-ethanol mixture.
