Julius Arnold Koch (August 15, 1864 – February 2, 1956) was an American chemist who was born in the

Free Hanseatic City of Bremen Bremen (), officially the Free Hanseatic City of Bremen (german: Freie Hansestadt Bremen; nds, Free Hansestadt Bremen), is the smallest and least populous of Germany's 16 states. It is informally called ("State of Bremen"), although the term ...

. Koch graduated from the

University of Pittsburgh The University of Pittsburgh (Pitt) is a public state-related research university in Pittsburgh, Pennsylvania. The university is composed of 17 undergraduate and graduate schools and colleges at its urban Pittsburgh campus, home to the universit ...

in 1884. He was the first

dean Dean may refer to: People * Dean (given name) * Dean (surname), a surname of Anglo-Saxon English origin * Dean (South Korean singer), a stage name for singer Kwon Hyuk * Dean Delannoit, a Belgian singer most known by the mononym Dean Titles * ...

of the School of Pharmacy at the University of Pittsburgh and held this position until his retirement in 1932. In 1897, he discovered, together with

Ludwig Gattermann Ludwig Gattermann (20 April 1860 – 20 June 1920) was a German chemist who contributed significantly to both organic and inorganic chemistry. Early life Ludwig Gatterman was born on 20 April 1860 in Goslar, an old mining town north of th ...

, the

Gattermann-Koch reaction The Gattermann reaction, (also known as the Gattermann formylation and the Gattermann salicylaldehyde synthesis) is a chemical reaction in which aromatic compounds are formylated by a mixture of hydrogen cyanide (HCN) and hydrogen chloride (HCl ...

(a method of synthesis of

benzaldehyde Benzaldehyde (C6H5CHO) is an organic compound consisting of a benzene ring with a formyl substituent. It is the simplest aromatic aldehyde and one of the most industrially useful. It is a colorless liquid with a characteristic almond-like odor. ...

using CO). He agreed on receiving the status of dean only after his following concern was taken into consideration "I will accept the deanship if the sessions are changed from evening to the daytime."

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* {{DEFAULTSORT:Koch, Julius Arnold 1864 births 19th-century American chemists 20th-century American chemists 1956 deaths Scientists from Bremen (city) Emigrants from the German Empire to the United States People from the Free Hanseatic City of Bremen