Joseph Proust, Date of Birth, Place of Birth, Date of Death

Joseph Proust

French chemist

Date of Birth: 26-Sep-1754

Place of Birth: Angers, Pays de la Loire, France

Date of Death: 05-Jul-1826

Profession: pharmacist, chemist, balloonist

Nationality: France

Zodiac Sign: Libra

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