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    • 1955-Oct-09

    Stamp depicts Leo Hendrik Baekeland, a Belgian chemist who invented Bakelite (polyoxybenzylmethylenglycolanhydride) in 1907. Bakelite was an inexpensive, versatile, and popular plastic, which marked the beginning of the…

    • 1966-Sep-07

    Friedrich August Kekule von Stradonitz was a German organic and theoretical chemist, whose most famous work was determining the structure of benzene. The FDC features Kekule on the cachet, a postmark depicting the…