This compound, Methyl 4-amino-3-(tert-butyl)benzoate hydrochloride, serves as a key intermediate in pharmaceutical research and development for the synthesis of active pharmaceutical ingredients (APIs). It is particularly utilized in creating drugs targeting anti-inflammatory effects, pain relief, and potential anti-cancer therapies, leveraging its amino and ester functional groups for structural modifications that improve efficacy and specificity. These modifications enable inhibition of enzymes or biochemical pathways involved in disease processes, such as inflammation or cancer cell growth. Additionally, it is applied in organic synthesis to build complex molecules and explore reaction mechanisms.