Used as an intermediate in the synthesis of fluorescent dyes and optical brighteners due to its strong electron-withdrawing nitrile and nitro groups combined with a conjugated quinoline backbone. Its structure allows for tunable photophysical properties, making it valuable in developing sensors for metal ions and pH detection. Also employed in the preparation of bioactive quinoline derivatives with potential antimicrobial and antitumor activities. The compound's hydroxyl and methoxy groups facilitate further functionalization for use in organic electronics and as a building block in medicinal chemistry.