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5-methoxy-2-methylbenzoic acid; CAS No.: 3168-59-0; 5-methoxy-2-methylbenzoic acid. PROPERTIES: 5-methoxy-2-methylbenzoic acid is a white crystalline powder with a molecular formula of C9H9O3. It has a molecular weight of 171.16 g/mol and a melting point of approximately 145-148 C. The compound exhibits moderate solubility in water and is more soluble in polar organic solvents like methanol and ethanol. It is sensitive to basic conditions and should be stored in a cool, dry place at temperatures below 30 C in a tightly sealed container. Safety precautions include avoiding skin contact and using eye protection. It is classified as a category 3 skin irritant according to GHS guidelines. APPLICATIONS: 5-methoxy-2-methylbenzoic acid serves as a key intermediate in the synthesis of various fragrances with fruity and spicy notes. Its methoxy group provides essential functionalities for odor profile modulation. In the field of medicinal chemistry, this compound is used in the preparation of anti-inflammatory agents where its aromatic system provides lipophilicity for receptor interactions. It also functions as a building block for the synthesis of chiral auxiliaries in asymmetric synthesis, as documented in the journal Tetrahedron: Asymmetry. Additionally, the compound is employed in the development of novel antimicrobial agents for surface disinfection applications, where its carboxylic acid group exhibits antimicrobial activity against various bacterial strains. Its unique structural features make it valuable in the synthesis of liquid crystalline materials for display technologies, as reported in Liquid Crystals, where its ability to form ordered structures contributes to improved electro-optical properties.