Used as an intermediate in the synthesis of non-steroidal anti-inflammatory drugs (NSAIDs), particularly in the production of naproxen. It serves as a key building block due to the presence of the methoxynaphthalene core, which contributes to the biological activity of the final pharmaceutical product. Its carboxylic acid functionality allows for easy derivatization and coupling reactions in multi-step organic syntheses. Commonly employed in industrial-scale drug manufacturing where stability and reactivity are essential.