Specifications Table

Product Name – METANIL YELLOW AR
Quantity/Pack Size – 25 g, 100 g
Form – Powder
Grade – AR (Analytical Reagent)
Application – Colorimetric analysis, titrations, indicator dye

Product Overview

Metanil Yellow AR is a synthetic azo dye widely recognized for its application in analytical chemistry as a precise pH indicator and titration reagent. Classified under the AR (Analytical Reagent) grade, this dye undergoes rigorous purification to eliminate impurities, ensuring accuracy in quantitative and qualitative laboratory procedures. Its distinct yellow hue transitions under varying pH conditions, making it invaluable for visual endpoint detection in acid-base titrations. The powdered form dissolves readily in aqueous solutions, providing uniform color distribution without residual particles. Chemically stable under standard lab conditions, Metanil Yellow AR resists degradation from light or moderate temperature fluctuations, preserving its efficacy over extended storage periods. Compatibility with common lab solvents like water and ethanol further enhances its versatility. Whether used in volumetric analysis or as a reference standard, its consistent molecular composition guarantees reproducible results, reducing experimental variability. The reagent?s non-hygroscopic nature prevents moisture absorption, maintaining its weight and concentration integrity. For laboratories prioritizing precision, this dye delivers reliable performance across repetitive tests, minimizing the need for recalibration.

FAQs

1. What is the solubility of Metanil Yellow AR in water?

Metanil Yellow AR is freely soluble in water, forming a clear yellow solution. The solubility increases slightly with temperature but remains stable under standard lab conditions.

2. Can this dye be used for non-aqueous titrations?

While primarily designed for aqueous systems, Metanil Yellow AR can be used in non-aqueous titrations with compatible organic solvents like ethanol or methanol, though color transitions may vary.

3. How should Metanil Yellow AR be stored to maintain its shelf life?

Store the dye in a tightly sealed container, away from direct sunlight and moisture. A cool, dry environment (below 30?C) is ideal for preserving its stability and color intensity.

4. Is Metanil Yellow AR compatible with acidic or basic solutions?

The dye functions effectively across a pH range of 1.2 to 2.3 for acid-base titrations. In highly alkaline conditions (pH > 10), the color may fade or shift, affecting accuracy.

5. What alternatives exist for Metanil Yellow AR in titration applications?

Methyl Orange or Bromophenol Blue can serve as alternatives, though their pH transition ranges differ. Metanil Yellow AR is preferred for its sharp color change at lower pH values.