Primarily used in the synthesis of pharmaceuticals, this compound serves as a key intermediate in the production of various active pharmaceutical ingredients (APIs). Its chlorosulfonyl group makes it valuable for creating sulfonamide derivatives, which are widely utilized in antibiotics, diuretics, and anti-inflammatory drugs. Additionally, it is employed in organic synthesis to introduce specific functional groups into complex molecules, aiding in the development of novel compounds with potential therapeutic applications. Its ethoxy and carboxylic acid groups further enhance its reactivity, making it a versatile building block in medicinal chemistry and drug discovery processes.