Depicts Justus von Liebig, known for his work in agricultural and organic chemistry.

Depicts Fritz Haber and Max Planck, Nobel Prize laureates in Chemistry and Physics.

Cachet depicts Otto Hahn's equipment and the nuclear fission of uranium atoms. Stamp shows Hahn's diagram of the splitting of the uranium nucleus. Hahn was the Nobel Prize Winner for Chemistry in 1944.

Stamps depict Niels Bohr, the equation for the Bohr frequency condition (an equation relating to light frequency and electrons), and a diagram of the Bohr model of a hydrogen atom.

Depicts Alexander Fleming, who won the Nobel Prize for the discovery of penicillin.

Cachet shows the Curie laboratory in Paris, and stamps depict Marie Curie with a bowl of radium.

Depicts awardees of the 1901 Nobel Prizes: Wilhelm Conrad Röntgen in Physics, Sully Prudhomme in Literature, Emil von Behring in Physiology or Medicine, and Jacobus Henricus van 't Hoff in Chemistry.

Depicts Wilhelm Conrad Röntgen, awarded the first Nobel Prize in Physics for the discovery of X-rays, along with an X-ray tube and an atom.

Postcard image is a reproduction of Finnish painter Albert Edelfelt's famed portrait "Pasteur Dans Son Laboratoire" [Pasteur In His Laboratory]. The portrait depicts Pasteur in his laboratory at the rue d'Ulm,…

Stamp issued during International Women's Year (1975), depicting Marie Curie, "discoverer of radium," by the former British colony Saint Christopher-Nevis-Anguilla (now called the Federation of Saint Kitts and Nevis.)

Depicts Isaac Newton.

Stamp depicts Boeing 707, chemical apparatus, and heavy oxygen isotopes.

Philatelic First Day Cover commemorating the 2nd centenary of the birth of Antoine Laurent Lavoisier (1743-1794), who is widely considered the father of modern chemistry.

Stamp issued by the Yemen Arab Republic depicting Persian polymath Avicenna (circa 980 - 1037), also known as Ibn Sina, Abu Ali Sina, and Pur Sina, as well as red roses and the new World Health Organization headquarters…

Stamp depicts measuring instruments.

Depicts Joseph Priestley, often credited for the discovery of oxygen.

Stamp issued by the "Deutsche Reich" government under Nazi rule depicting images associated with the profession of chemistry.

Stamp depicts aspects of chemistry and related sciences. The design depicting a laboratory vessel is illustrative of the scientific equipment used widely for research in the chemical industry. A representative chemical…

Stamp from the inauguration of Democritus Nuclear Research Centre in Agia Paraskevi. Depicts ancient Greek philosopher Democritus and a model of an atom.

Stamp depicts chemical glassware, electron microscope, molecule, and microscopic view of cell.

Stamp depicts aspects of chemistry and related sciences.

Depicts a chemist with test tube and flask, as well as the chemical structure of a carboxyl group.

Cachet, stamp, and postmark depict oil derricks.

Cachet created by Fleetwood depicts "The Chemist" along with ACS logo and the tagline, "Maker of a Better Tomorrow." Stamp issued to commemorate the diamond jubilee of the American Chemical Society. Addressed to and…

Cachet and stamp depict oil pipeline and drilling derricks.