Description
Specifications Table
Product Name – Alizarine Red S AR
Quantity/Pack Size – 25 g, 100 g
Form – Powder
Grade – AR (Analytical Reagent)
Application – pH indicator, complexometric titrations, staining
Product Overview
Alizarine Red S AR is a high-purity, water-soluble anthraquinone dye widely used in analytical chemistry for its sharp color transitions and stability. As an Analytical Reagent (AR) grade compound, it meets stringent purity standards, ensuring accurate results in qualitative analysis, pH titrations, and metal ion detection. The dye exhibits a distinct red-to-yellow color change in acidic to alkaline conditions, making it ideal for endpoint detection in complexometric titrations. Its fine powder form ensures easy dissolution and uniform dispersion in aqueous solutions. Alizarine Red S is also employed in histological staining and as a chelating agent for calcium, magnesium, and other metal ions. The product is packaged in airtight containers to prevent moisture absorption and degradation, guaranteeing long-term stability. Whether used in educational labs or research settings, this reagent delivers consistent performance due to its controlled synthesis and rigorous quality checks. The absence of impurities ensures minimal interference in sensitive assays, while its compatibility with standard lab protocols makes it a versatile choice for chemists and biologists.
FAQs
1. What is the solubility of Alizarine Red S AR in water?
Alizarine Red S AR is highly soluble in water, forming a clear red solution at neutral pH. For best results, dissolve the powder in distilled or deionized water and filter if necessary to remove any undissolved particles.
2. Can this dye be used for calcium ion detection?
Yes, Alizarine Red S AR forms a stable complex with calcium ions, producing a visible color change that can be quantified spectrophotometrically or observed visually in titration experiments.
3. How should Alizarine Red S AR be stored to maintain its shelf life?
Store the reagent in a cool, dry place away from direct sunlight and moisture. Keep the container tightly sealed when not in use to prevent oxidation or contamination.
4. Is this product compatible with EDTA titrations?
Alizarine Red S AR is commonly used as an indicator in EDTA titrations for determining metal ion concentrations, particularly for calcium and magnesium, due to its selective color change at the equivalence point.
5. What alternatives exist for Alizarine Red S in pH indication?
Alternatives include phenolphthalein for alkaline titrations or methyl orange for acidic ranges, though Alizarine Red S is preferred for its sharp transition in the pH 4.5–6.5 range and metal ion specificity.
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