Specifications Table
Product Name – METHYL ORANGE INDICATOR ACS
Quantity/Pack Size – 25 g, 100 g, 1000 g
Form – Powder
Grade – ACS
Application – pH indicator for acid-base titrations
Product Overview
Methyl Orange ACS is a high-purity, synthetic pH indicator designed for precise acid-base titrations in laboratory settings. This water-soluble powder exhibits a distinct color transition from red (pH 4.4), making it ideal for detecting endpoint reactions in acidic to weakly acidic solutions. The ACS (American Chemical Society) grade ensures superior quality, with minimal impurities and consistent performance, meeting stringent analytical standards. Its stable shelf life and non-hygroscopic nature allow for long-term storage without degradation. The indicator is compatible with most aqueous solutions and does not interfere with common titration reactions. For optimal results, use in concentrations of 0.1% (w/v) in distilled water, ensuring clear visibility of the color change. This product is particularly effective in titrations involving strong acids and weak bases, where its sharp transition range provides unambiguous endpoint detection.
FAQs
1. What is the exact pH range for Methyl Orange’s color transition?
The color transition occurs between pH 3.1 (red) and pH 4.4 (yellow), with the most noticeable change around pH 3.8.
2. Can this indicator be used in non-aqueous titrations?
Methyl Orange is primarily designed for aqueous solutions and may not provide accurate results in non-polar or organic solvents.
3. How should I prepare a working solution of Methyl Orange?
Dissolve 0.1 g of the powder in 100 mL of distilled water to create a standard 0.1% solution for titrations.
4. What alternatives exist for titrations in alkaline pH ranges?
Phenolphthalein (pH 8.3-10.0) or Thymol Blue (pH 8.0-9.6) are suitable alternatives for alkaline titrations.
5. Does exposure to light affect the indicator’s performance?
Prolonged light exposure may cause slight degradation; store in an amber bottle or opaque container for long-term stability.