Othmar Zeidler

German chemist

Othmar Zeidler

Born| 29 August 1850

Vienna, Austria

Died| 17 June 1911 (aged 60)

Mauer, Vienna, Austria

Occupation(s)| Pharmacist, chemist
Known for| The creation of DDT

Othmar Zeidler (29 August 1850 – 17 June 1911)[1][2][Notes 1] was an Austrian chemist credited with the first synthesis of DDT.

He was born on 29 August 1850 in Vienna a son of the Viennese pharmacist Franz Zeidler. Othmar's brother, Franz Zeidler Jr. (1851–1901), also became a chemist and would collaborate with him on several projects.[3] As a doctoral student with Adolf von Baeyer at the University of Strasbourg, then in Germany, Zeidler is credited with the first synthesis of the insecticide dichlorodiphenyltrichloroethane, or DDT in 1874. Othmar returned to Austria before 1876 and, after working at the I. chemischen Universitätslaboratorium at the University of Vienna,[3] became a pharmacist in the Fünfhaus district of the capital.[4] He died in Mauer near Vienna on 17 June 1911.

## Notes

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1. ^ Though many sources mention 1859 as Zeidler's year of birth, this would make him a mere 14 years old at the time of his dissertation in 1873. The 1859 birth year was used by Joseph S. Fruton, in his Contrasts in scientific style: research groups in the chemical and biochemical sciences, Memoirs of the American Philosophical Society, Vol 191, 1990, p. 373, as well as by Gerhard Oberkofler in Leopold Ruzicka, 1887–1976: schweizer Chemiker und Humanist aus Altösterreich, p. 44. The latter even has him quit his pharmacy studies at the Vienna University in 1872 (at the apparent age of 12/13) to move to Strassburg. However, Materialien zur Geschichte der Apotheken und Apotheker Niederösterreichs gives his year of birth as 1850; furthermore, his obituary at Oesterreichische Chemiker–Zeitung in 1911 states that Zeidler was 61 years at the time of his death, placing his birth around 1850 (in reality, Zeidler died 2 months shy of his 61st birthday).

## References

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1. ^ Kurt Ryslavy: Materialien zur Geschichte der Apotheken und Apotheker Niederösterreichs. Österreichische Apotheker-Verlagsgesellschaft, Vienna 1991, ISBN 9783852000848, p. 415.
2. ^ Oesterreichische Chemiker–Zeitung Nr. 13 (1911), p. 169.
3. ^ a b Obituary of Franz Zeidler Jr in Zeitschrift des allgemeinen Oesterreichischen Apotheker-Vereines, Volume 39, 1901
4. ^ Zeitschrift des allgemeinen Oesterreichischen Apotheker-Vereines, Volume 27 (1889)

## External links

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* History | CDC Malaria at www.cdc.gov
* Othmar Zeidler (1874). "Verbindungen von Chloral mit Brom- und Chlorbenzol". Berichte der Deutschen Chemischen Gesellschaft. 7 (2): 1180–1181\. doi:10.1002/cber.18740070278.

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