Used as a pH indicator in analytical chemistry, particularly in acid-base titrations. It exhibits a distinct color change in response to pH shifts, making it valuable for detecting endpoint changes in weak acid or weak base systems. Commonly employed in biochemical and environmental testing where precise pH monitoring is required. Also utilized in dye-sensitized applications and as an intermediate in the synthesis of other azo dyes for textiles and printing industries. Its solubility in water enhances its utility in aqueous-based analytical procedures.