Chemist no. 45 of 350 · Inorganic

Joseph Louis Proust

1754-1826France

Law of definite proportions

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The discovery, explained

Proust's Law: Why a Compound Always Has the Same Composition

Joseph Proust's law of definite proportions explained: copper carbonate experiments, Berthollet debate, non-stoichiometric compounds and exam points.

Publishing soon · 6 min read

Biography

Joseph Louis Proust: The Patient Analyst Who Proved That Compounds Have Fixed Composition

Biography of Joseph Louis Proust, French chemist who established the law of definite proportions: life in Spain, Berthollet debate, career timeline and legacy.

Publishing soon · 5 min read

Academic lineage

Documented doctoral, postdoctoral and teaching links. Dashed chips are teachers outside the 350 chemists listed here.

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