# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/joseph-proust
# Generated: 2026-08-31T19:38:24.742Z

schema: https://schema.org/Person
url: "https://fame.am/person/joseph-proust"
name: "Joseph Proust"
slug: "joseph-proust"
description: "The chemist who proved that nature follows recipes: chemical compounds lock into fixed ratios, never fudging the proportions."
tagline: "French chemist"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Proust_joseph.jpg"
gender: "male"
country:
  name: "France"
  isoCode: "FR"
category:
  name: "Scientists"
  slug: "scientists"
profileType:
  name: "Scientist"
  slug: "scientist"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1754-09-26"
deathDate: "1826-07-05"
livingStatus: "DECEASED"
scores:
  popularity:           55.21
  momentum:             6.573033707865168
  historical:           22.53254666666667
  currentAttention:     36.51685393258426
  sourceConfidence:     60
  profileCompleteness:  70
  trendDirection:       "RISING"
ranks:
  global:   null
  country:  null
  category: null
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  - name: "Scientist"
    slug: "scientist"
  - name: "Chemistry"
    slug: "chemistry"
  - name: "France"
    slug: "france"
  - name: "Europe"
    slug: "europe"
  - name: "Early Modern Era"
    slug: "early-modern-era"
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    type:  "WIKIPEDIA"
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    title: "Joseph Proust"
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    title: "Louis Proust"
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    title: "Ժոզեֆ Լուի Պրուստ"
    type:  "WIKIPEDIA"
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    title: "Joseph Louis Proust"
    type:  "WIKIPEDIA"
  - url: "https://it.wikipedia.org/wiki/Joseph_Proust"
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    type:  "WIKIPEDIA"
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# bio (long form, separated for readability)
bio: |
  Joseph Louis Proust was born in France on 26 September 1754. Working as a chemist through the turn of the 19th century, he arrived at a discovery that redrew the ground rules: in 1797 he announced the law of definite proportions, the principle that chemical compounds always combine in constant, unchanging ratios. It was a line in the sand against randomness, proof that matter obeyed strict mathematical order. He died on 5 July 1826, leaving chemistry with a law it still teaches in every first-year course.