Ethyl 2-hydroxybenzoate

Ethyl 2-hydroxybenzoate (CAS No.: 118-61-6) is an ester derivative of salicylic acid that is widely utilized as a small-molecule reference compound in biochemical and pharmaceutical research, particularly in studies of inflammation-related signaling and transdermal drug delivery systems. Classified as a naturally occurring aromatic ester, it exhibits moderate lipophilicity, enabling its frequent use as a model permeant in investigations of skin absorption, release kinetics, and formulation optimization for topical delivery platforms. Mechanistically, it is reported to interact with cyclooxygenase-associated pathways, with inhibitory effects observed in vitro that are generally characterized within the low micromolar to sub-millimolar range, supporting its relevance in probing prostaglandin-mediated inflammatory responses. In addition to its functional role in pathway-oriented assays, this compound is commonly employed in experimental systems to evaluate penetration enhancers, carrier matrices, and diffusion behaviors across biological membranes. Typical applications include use in cell-based assays and ex vivo or in vivo permeability models, where concentrations and exposure conditions are adjusted according to specific experimental objectives. Its well-defined physicochemical profile and compatibility with diverse formulation strategies make it a practical tool for mechanistic studies in drug delivery and pharmacokinetic modeling.