Methyl red alcohol solution is widely used as a pH indicator in various laboratory settings. It is particularly useful in microbiology for differentiating bacterial species based on their ability to metabolize specific substrates. In this context, it helps identify organisms that produce mixed acids during fermentation, as it changes color in response to pH shifts, typically from red at acidic pH to yellow at neutral or alkaline pH. Additionally, it is employed in titration experiments to determine the endpoint in acid-base reactions, providing a clear visual indication of pH changes. Its solubility in alcohol makes it suitable for use in solutions where water-based indicators might not be effective.