Joseph Proust

Joseph Louis Proust (26 September 1754 – 5 July 1826) was a French chemist. He was best known for his discovery of the law of definite proportions in 1794, stating that chemical compounds always combine in constant proportions.

Joseph Louis Proust
Born
Joseph Louis Proust

(1754-09-26)26 September 1754
Angers, France
Died5 July 1826(1826-07-05) (aged 71)
Angers, France
OccupationChemist
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