Jean Baptiste André Dumas (14 July 1800 – 10 April 1884) was a French chemist, best known for his works on organic analysis and synthesis, as well as the determination of atomic weights (relative atomic masses) and molecular weights by measuring vapor densities. He also developed a method for the analysis of nitrogen in compounds.
Eugène-Melchior Péligot (24 March 1811 in Paris – 15 April 1890 in Paris), also known as Eugène Péligot, was a French chemist who isolated the first sample of uranium metal in 1841.
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Alwin Mittasch (sorbian:Pawoł Alwin Mitaš) (born 27 December 1869 in Großdehsa/Dažin, today to Löbau, Germany; died 4 June 1953 in Heidelberg, Germany) was a German chemist as well as scientific historian of Sorbian descent. He succeeded above all by his pioneering and systematic research in the development of catalysts. His work led to the industrial relevance of ammonia synthesis in the Haber–Bosch process.