Methyl Orange Analytical Reagent
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Product Code : SCL-CA-12678
Quick Answer: The Methyl Orange Analytical Reagent is an azo-dye acid-base indicator that turns from red in strongly acidic conditions through orange to yellow, used for endpoint detection in suitable titrations and pH demonstrations.
Last updated: October 2026
Key Features
- Azo-dye indicator, molecular formula C14H14N3NaO3S
- Colour change from red through orange to yellow as acidity decreases
- Commonly cited transition range of about pH 3.1 to 4.4
- Gives endpoint indication when its range matches the titration method
- Only a small, controlled amount is needed for each test
Technical Specifications
| Specification | Value |
|---|---|
| Chemical type | Azo-dye acid-base indicator |
| Molecular formula | C14H14N3NaO3S |
| Colour transition | Red to orange to yellow |
| Transition range | Approximately pH 3.1 to 4.4 |
About This Product
In a titration, the indicator is added to the test solution in the quantity the method specifies, and the colour is watched against a white background. Titrant is added slowly near the expected endpoint and the persistent colour change is recorded. The indicator is also used to show acidic, transitional and less-acidic colour states and to compare indicator transition ranges.
Frequently Asked Questions
Q1. At what pH does methyl orange change colour?
Its commonly referenced transition range is approximately pH 3.1 to 4.4. It is red in strongly acidic conditions, yellow above this range, and orange during the change.
Related: Chemical Analysis, High Purity Phenolphthalein Indicator Solution, Laboratory Quality Ammonium Chloride.
For a quotation on the Methyl Orange Analytical Reagent, contact School Equipments India.
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