Methyl red is widely used as a pH indicator in various scientific and industrial applications. It is particularly valuable in microbiology for differentiating bacterial species based on their ability to ferment glucose. In this context, it helps identify enteric bacteria by changing color in response to pH shifts during fermentation. Additionally, it is employed in titration experiments to determine the endpoint of acid-base reactions due to its distinct color change at a pH range of 4.4 to 6.2. In environmental science, methyl red is used to assess water quality by detecting pH changes in aquatic systems. Its application also extends to educational laboratories, where it serves as a teaching tool for demonstrating pH concepts and chemical reactions.