6-Ethoxy-2-naphthoic acid is primarily used in the synthesis of pharmaceuticals and organic compounds. It serves as a key intermediate in the production of anti-inflammatory drugs, particularly nonsteroidal anti-inflammatory drugs (NSAIDs). Additionally, it is utilized in the development of dyes and pigments due to its naphthalene structure, which provides stability and color properties. In research, it is employed as a building block for creating complex molecules in organic chemistry studies.