B
- Leo Hendrik Baekeland (1863-1944)
- Born in Belgium.
- He invented phenolformaldehyde.
- Johann Friedrich Wilhelm Adolf von Baeyer (1835-1917)
- Born in Germany.
- He elucidated the structure of indigo.
- Sir Frederick Banting (1871-1941)
- Born in Canada.
- He isolated the insulin molecule.
- He was awarded the Nobel Prize in medicine in 1923.
- Frederick Bergius (1884-1949)
- Born in Sweden.
- He invented a method of converting coal dust into oil by pressurized hydrogen.
- He invented a method for the production of cattle feed from wood by hydrolysis.
- He was awarded the Nobel Prize for chemistry in 1911.
- Claude Louis Berthollet (1748-1822)
- Born in France.
- He discovered the bleaching power of chlorine.
- He studied the combining weights of atoms.
- Friedrich Konrad Beilstein (1838-1906)
- Born in Russia.
- He compiled a multivolume compendium of the properties and reactions of organic chemicals.
- Johann Berzelius (1779-1848)
- Born in Sweden.
- He discovered selinium, silicon, thorium, titanium, and zirconium.
- He classified minerals chemically.
- He originated the terms catalyst and .
- Paul Émile Lecoq de Boisbaudran (1838-1912)
- Born in France.
- He discovered gallium, dysprosium, and samarium.
- Ludwig Boltzmann (1844-1906)
- Born in Austria.
- He developed the kinetic theory of gases.
- He formulated Boltzmann's Law.
- Sir Robert Boyle (1637-1691)
- Born in Ireland.
- He formulated the first gas laws.
- He conceived that small particles combine to form molecules.
- He formulated Boyle's Law.
- Robert Wilhelm Bunsen (1811-1899)
- Born in Germany.
- He discovered caesium and rubidium.
- He improved the method of silicate analysis.