Jeremias Benjamin Richter

Jeremias Benjamin Richter (; 10 March 1762 – 4 May 1807) was a German chemist. He was born at Hirschberg in Silesia, became a mining official at Breslau in 1794, and by 1800 was appointed assessor to the department of mines and chemist to the royal porcelain factory at Berlin, where he died. He is known for introducing the term stoichiometry.

Developer of titration He made some of the earliest known determinations of the quantities by weight in which acids saturate bases and bases acids. He realised that those amounts of different bases which can saturate the same quantity of a particular acid are equivalent to each other When Joseph Proust reported his work on the constant composition of chemical compounds, the time was ripe for the reinvention of an atomic theory. The law of definite proportions and constant composition alone do not prove that atoms exist, but their existence is difficult to explain without assuming that chemical compounds are formed when atoms combine in constant proportions.

Publications His findings were published in Über die neueren Gegenstände in der Chemie (1792–1802) and Anfangsgründe der Stöchiometrie or Messkunst chemischer Elemente (1792–1794), but a considerable period of time elapsed before they were fully acknowledged. This was partly because some of his work was incorrectly ascribed to Carl Wenzel by Jons Berzelius which was only corrected in 1841 by Henri Hess, professor of chemistry at St. Petersburg, and author of the laws of constant heat-sums and of thermoneutrality. His work therefore had little impact until 1802, when it was summarized by Ernst Gottfried Fischer in terms of tables.