Widely used in acid-base titrations, especially in educational laboratories, to determine the pH change during neutralization reactions. It is particularly effective in strong acid-strong base titrations where the pH change is sharp. The color change from red (acidic) to yellow (basic) around pH 3.1 to 4.4 makes it ideal for detecting the endpoint in titrations involving hydrochloric acid and sodium hydroxide. Due to its clear and distinct transition, it is also used in demonstrations and experiments to teach pH indicators and reaction stoichiometry. Not suitable for weak acid-weak base titrations due to the gradual pH change outside its transition range.