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2-(methoxycarbonyl)benzoic acid; CAS No.: 4376-18-5; 2-(methoxycarbonyl)benzoic acid. PROPERTIES: This dicarboxylic acid derivative is a white crystalline powder with molecular formula C9H8O4. It has molecular weight of 172.16 g/mol and melting point around 160-163 C. The compound is moderately soluble in hot water and ethanol but insoluble in non-polar solvents. Recommended storage is in well-closed containers at room temperature. Being an organic acid, it may cause skin and eye irritation; standard industrial hygiene practices should be followed. APPLICATIONS: In the polymer industry, this compound serves as monomer for producing polyesters with improved mechanical properties. The methoxycarbonyl group undergoes esterification reactions with diols to form high molecular weight polymers (Journal of Polymer Science). In pharmaceutical applications, it acts as intermediate for synthesizing non-steroidal anti-inflammatory drugs where the carboxylic acid group contributes to cyclooxygenase inhibition (Journal of Medicinal Chemistry). The benzene ring provides planar structure that enhances receptor binding. Additionally, it functions as building block for producing fluorescent dyes where the carboxylic acid groups are converted to esters or amides for attachment to target molecules (Dyes and Pigments). These applications take advantage of its dual carboxylic acid and ester functionalities for constructing diverse materials and pharmaceutical agents.