- Henry Cavendish presented the quantitative composition of water before Royal Society (1784).
- Born in 1785, William Prout suggested that all atomic weights were multiples of weight of hydrogen (H, 1) (Prout's hypothesis); identified hydrochloric acid in the stomach.
- Born in 1895, Artturi I. Virtanen was a researcher on nutrition and development of food resources; Nobel Prize in Chemistry (1945) "for his research and inventions in agricultural and nutrition chemistry, especially for his fodder preservation method."
- Born in 1912, Frank H. Westheimer is a researcher on the calculation of electric effects in chemistry.
- Born in 1767, Anders G. Ekeberg discovered tantalum (Ta, 73) in 1802.
- First isolation by ion-exchange chromatography and identification of fermium (Fm, 100) with sample of only about 200 atoms at University of California, Berkeley (1953).
- Born in 1781, Robert Hare invented the oxyhydrogen blowtorch (1801).
- Born in 1825, Edward Frankland developed the theory of valency (1852-60); discovered helium (He, 2) in the sun with N. Lockyer (1868); authority on sanitation and river pollution.
- Born in 1861, Hans Goldschmidt invented the alumino-thermite process (often called the “Goldschmidt process”) in 1898. This process is of particular value in welding.
- Born in 1885, Harry L. Fisher was an inventor in the field of rubber technology and synthetic rubber.
- Born in 1834, Adolph Frank made calcium cyanamide from calcium carbide and nitrogen (1898).
- Born in 1845, Edward Mallinckrodt was the founder of Mallinckrodt Chemical Works.
- Born in 1912, Konrad Bloch was a researcher on cholesterol and fatty acid metabolism; Nobel Prize in Physiology or Medicine (1964) with Feodor Lynen "for their discoveries concerning the mechanism and regulation of the cholesterol and fatty acid metabolism."
- Dow Chemical Co., Freeport, TX, produced an ingot of magnesium (Mg, 12), the first commercial ingot of any metal to be extracted from seawater (1941).