This commemorative stamp issued by France honors the renowned chemist Louis Jacques Thénard (1777–1857), celebrated for his significant contributions to chemical science, including research on hydrogen peroxide. The portrait-style engraving highlights classical French stamp design with fine intaglio detailing and a scientific motif in the background symbolizing laboratory instruments. Issued in a 15-franc denomination, this stamp reflects France’s tradition of commemorating distinguished scientists and intellectual heritage. Well-centered examples with clear perforations are particularly desirable among thematic collectors specializing in science, chemistry, or French commemoratives. A meaningful addition to European scientific-themed collections.