Lacmoid is primarily used as a pH indicator in various chemical and biological applications. It is particularly valued for its ability to change color in response to pH changes, making it useful in titrations and experiments where monitoring acidity or alkalinity is essential. In microbiology, it can be employed to assess the pH of growth media, ensuring optimal conditions for microbial cultures. Additionally, Lacmoid finds application in educational laboratories to demonstrate pH-dependent color changes, helping students understand acid-base chemistry. Its stability and distinct color transition make it a reliable choice for analytical purposes in both research and industrial settings.