Methyl Orange AR 25g

Methyl Orange AR 25g

Methyl orange AR 25g is most commonly used as a pH indicator in analytical chemistry and for educational purposes.

The “AR” designation means it is an “Analytical Reagent” grade, indicating a high level of purity suitable for laboratory testing.

Methyl Orange AR 25g Primary lab uses
Acid-base titrations: Methyl orange is particularly effective for titrations of strong acids and weak bases.
Its color change from red to yellow occurs sharply in the acidic pH range of 3.1 to 4.4, providing a clear endpoint.
This makes it useful for accurately determining the concentration of an unknown solution.

pH indicator: In general pH testing, it indicates a specific acidic range. It is yellow in alkaline and neutral solutions, orange in the transition phase, and red in strong acidic solutions.

Water quality testing: It is used to test the pH of water samples, especially in industrial wastewater or effluent analysis where acidic conditions may be present.
Soil testing: Methyl orange can be used in soil chemistry to assess the pH of soil samples.
Other applications
Biological staining: As an azo dye, methyl orange is sometimes used for staining cells and tissue sections in biological and histological studies.
Educational demonstrations: Its distinct and reliable color change makes it a popular choice for classroom demonstrations and student experiments to teach acid-base concepts.
Handling precautions
As with all lab chemicals, standard safety precautions should be followed when handling methyl orange. It can stain skin and clothes, and there is a potential risk of it causing irritation if ingested, inhaled, or exposed to the skin or eyes.

Methyl Orange AR 25g