Used in the synthesis of azo dyes and hair dyes due to its ability to form colored compounds when diazotized and coupled with other aromatic compounds. Commonly employed in the textile industry for dye production. Also serves as an intermediate in the manufacture of pharmaceuticals, including certain analgesics and antipyretics. Plays a role in the production of photographic developers and antioxidants for rubber and lubricants. Additionally, it is used in some agrochemicals and as a reagent in analytical chemistry for detecting various ions.