Famous Chemists Of The 19th Century

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Chemistry has been one of the foremost important disciplines of science. Of all the scientists working in this field or branch of science, chemists are the most important contributors. They specialize in the field with their job involving studying the chemical nature of substances and examining their behaviour in different situations and different conditions. Chemists also are involved in understanding the composition and properties of unknown substances, using them further in practical applications in industries. Since chemicals play a vital role in virtually all types of industries, chemists are employed in various industrial establishments, including plastics, medicines, pharmaceuticals, paints and so on. The role of a chemist is mostly involved in laboratory research. Over the years, chemists have voluminously contributed in this field of study. The 19th century saw some of the greatest of chemists rise in number. Be it the Swiss Nobel laureate Alfred Werner who founded coordination chemistry or German Nobel prize winner Carl Bosch who developed the Haber Bosch process for high pressure synthesis of ammonia, 19th century has had legendary chemists whose contributions have been magnanimous in the field. Check this segment and discover some of the most important and famous chemists of the 19th century.
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 1 
Marie Curie
(The First Woman to Win a Nobel Prize)
Marie Curie
14
Birthdate: November 7, 1867
Sun Sign: Scorpio
Birthplace: Warsaw, Poland
Died: July 4, 1934
Amongst the most notable scientists of her time, the first woman to win a Nobel Prize, the sole person to win two Nobel Prize in two different category, and the first woman professor at the University of Paris—Marie Curie’s list of achievements is incredible. She did extensive research in the field of radioactivity and discovered polonium and radium.
 2 
Michael Faraday
(Scientist)
Michael Faraday
6
Birthdate: September 22, 1791
Sun Sign: Virgo
Birthplace: Newington Butts, London, United Kingdom
Died: August 25, 1867

Michael Faraday was an English scientist known for his contribution to the study of electrochemistry and electromagnetism. Considered one of the most influential scientists ever, Faraday's inventions of electromagnetic rotary devices established the basis for electric motor technology. His research also helped understand the concept of the electromagnetic field. Ernest Rutherford called him one of the greatest scientific discoverers ever.

 3 
Louis Pasteur
(Chemist and Microbiologist)
Louis Pasteur
12
Birthdate: December 27, 1822
Sun Sign: Capricorn
Birthplace: Dole, France
Died: September 28, 1895
Considered one of the founders of bacteriology, Louis Pasteur created vaccines for anthrax and rabies, and invented the process of heating food and wine to kill microbes that cause contamination, which was named pasteurization after him. Known as the “father of microbiology,” he also founded the Pasteur Institute in Paris.  
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 4 
George Washington Carver
(Agricultural scientist)
George Washington Carver
5
Birthdate: 1864
Sun Sign: Capricorn
Birthplace: Diamond, Missouri, United States
Died: January 5, 1943
Agricultural scientist George Washington Carver is best remembered for promoting crops that were alternative to cotton, such as peanuts and sweet potatoes. He invented ways to prevent soil depletion and developed scores of products made from peanuts, including paints and cosmetics. He won numerous honors, such as the Spingarn Medal.
 5 
Dmitri Mendeleev
(Inventor of Periodic Table)
Dmitri Mendeleev
6
Birthdate: February 8, 1834
Sun Sign: Aquarius
Birthplace: Tobolsk
Died: February 2, 1907
Russian chemist Dmitri Mendeleev created the Periodic Law and his version of the Periodic Table of Elements that revolutionized the field of chemistry. His table was independent of German chemist Julius Lothar Meyer’s version of the table. Mendeleev also assisted in the development of the first oil refinery in Russia.
 6 
Alfred Nobel
(Chemist)
Alfred Nobel
6
Birthdate: October 21, 1833
Sun Sign: Libra
Birthplace: Stockholm, Sweden
Died: December 10, 1896

Alfred Nobel was a Swedish chemist, engineer, and inventor. A prolific inventor, he held 355 different patents. Most popular as the inventor of dynamite, he was concerned with how he would be remembered after his death and bequeathed his fortune to the Nobel Prize institution. A wide traveler, he was proficient in several languages.

 7 
Ernest Rutherford
(New Zealand Physicist Who is Known as the Father of Nuclear Physics)
Ernest Rutherford
7
Birthdate: August 30, 1871
Sun Sign: Virgo
Birthplace: Brightwater, New Zealand
Died: October 19, 1937

New Zealand physicist Ernest Rutherford is remembered as the father of nuclear physics. His discovery of radioactive half-life and of radon, and his differentiation of alpha and beta radiation, won him the Nobel Prize in Chemistry in 1908. Element 104 was named rutherfordium in his honor.

 8 
John Dalton
(Chemist, Physicist and Meteorologist Best Known for Developing the 'Atomic Theory')
John Dalton
6
Birthdate: September 6, 1766
Sun Sign: Virgo
Birthplace: Eaglesfield, Cumberland, England
Died: July 27, 1844

John Dalton was an English chemist, physicist, and meteorologist most famous for introducing the atomic theory into chemistry. He also contributed a lot to the study of color blindness, sometimes referred to as Daltonism in his honor. He was the first scientist to refer to the smallest particle of matter as an “atom.” He was a Quaker and lived modestly. 

 9 
Fritz Haber
(Chemist)
Fritz Haber
7
Birthdate: December 9, 1868
Sun Sign: Sagittarius
Birthplace: Wrocław
Died: January 29, 1934

Fritz Haber was a German chemist who was honored with the prestigious Nobel Prize in Chemistry for inventing the Haber-Bosch process. The process is used widely to synthesize ammonia from hydrogen gas and nitrogen gas. For his pioneering work in weaponizing poisonous gases like chlorine during World War I, Haber is referred to as the father of chemical warfare.

 10 
Joseph Priestley
(Discoverer of Oxygen)
Joseph Priestley
5
Birthdate: March 24, 1733
Sun Sign: Aries
Birthplace: Birstall, England
Died: February 6, 1804

Best remembered for his contribution to the chemistry of gases, Joseph Priestley was an English scientist, clergyman, political theorist and educator, who has been credited with discovering oxygen independently, publishing his findings before Carl Wilhelm could. A prolific writer, he has authored 150 works on various subjects including electricity. He also contributed immensely to the advancement of political and religious thoughts.

 11 
Henry Moseley
(Physicist)
Henry Moseley
5
Birthdate: November 23, 1887
Sun Sign: Sagittarius
Birthplace: Weymouth, Dorset, England
Died: August 10, 1915

Henry Moseley was an English physicist best known for his development of Moseley's law in X-ray spectra. He made major contributions to the fields of atomic physics, nuclear physics, and quantum physics. He was working at the University of Oxford when World War I broke out, following which he went to volunteer for the Royal Engineers of the British Army. 

 12 
Henry Cavendish
(English Scientist Who Discovered Hydrogen)
Henry Cavendish
4
Birthdate: October 10, 1731
Sun Sign: Libra
Birthplace: Nice, France
Died: February 24, 1810

English natural philosopher, scientist, and a prominent experimental and theoretical physicist and chemist Henry Cavendish is best-remembered for his discovery of hydrogen and his Cavendish experiment. He first recognized that hydrogen, which he termed inflammable air, is a discrete substance which produces water on combustion. He conducted the Cavendish experiment to measure and produce a value for Earth’s density.

 13 
Otto Hahn
(Chemist)
Otto Hahn
6
Birthdate: March 8, 1879
Sun Sign: Pisces
Birthplace: Frankfurt
Died: July 28, 1968
Nobel Prize-winning German chemist Otto Hahn is remembered for revolutionary discovery of nuclear fission, along with Fritz Strassmann. Born to a glazier, he was pushed to study architecture but chose chemistry instead. He spent his final years grieving the death of his only son in a car accident.
 14 
William Henry Perkin
(British Chemist Known for His Serendipitous Discovery of First Commercial Synthetic Organic Dye, 'Mauveine')
William Henry Perkin
4
Birthdate: March 12, 1838
Sun Sign: Pisces
Birthplace: London, England
Died: July 14, 1907

William Henry Perkin is best remembered for his chance discovery of the dye mauveine, made of aniline purple. He had apparently discovered the dye while attempting to synthesize quinine. The Royal Medal-winning British chemist also studied salicyl alcohol and flavoring agents and synthesized the first artificial perfume.

 15 
Svante Arrhenius
(Scientist)
Svante Arrhenius
4
Birthdate: February 19, 1859
Sun Sign: Pisces
Birthplace: Vik
Died: October 2, 1927

Svante Arrhenius was a Swedish scientist who became the first Swedish person to win a Nobel Prize when he won the Nobel Prize for Chemistry in 1903. Although he was originally a physicist, Arrhenius is widely accepted as a chemist and is best remembered for co-founding physical chemistry. Stockholm University houses the Arrhenius Labs, which is named in his honor.

 16 
Robert Bunsen
(Chemist)
Robert Bunsen
4
Birthdate: March 30, 1811
Sun Sign: Aries
Birthplace: Göttingen
Died: August 16, 1899

Chemist Robert Bunsen paved the path for spectrum analysis with his discovery that every element emits a light of a particular wavelength. He also co-developed and lent his name to the Bunsen burner. He almost died of arsenic poisoning and lost sight in his right eye in a laboratory explosion.

 17 
Josiah Willard Gibbs
4
Birthdate: February 11, 1839
Sun Sign: Aquarius
Birthplace: New Haven, Connecticut, United States
Died: April 28, 1903

Josiah Willard Gibbs was an American scientist best remembered for making major theoretical contributions to mathematics, physics, and chemistry. As a mathematician, Gibbs is credited with inventing modern vector calculus. In 1901, he was honored with the prestigious Copley Medal for his contributions. Josiah Willard Gibbs's work had a major influence on physicists like J. D. van der Waals.

 18 
William Ramsay
3
Birthdate: October 2, 1852
Sun Sign: Libra
Birthplace: Glasgow, Scotland
Died: July 23, 1916

The son of a civil engineer, Nobel Prize-winning Scottish chemist William Ramsay revolutionized science with his pathbreaking discovery of the noble gases, thus forming an entirely new segment of the periodic table. He is also remembered for his long association with UCL. He was knighted for his achievements.

 19 
Justus von Liebig
4
Birthdate: May 12, 1803
Sun Sign: Taurus
Birthplace: Darmstadt, Germany
Died: April 18, 1873

German chemist Justus von Liebig is best known for his research on organic compounds and his contribution to biochemistry and agriculture. The Copley Medal-winning scientist initially studied pharmacy but later switched to chemistry. As a professor, he stressed on laboratory-based teaching of chemistry and separating it from pharmacy, opposing traditional methods.

Joseph Louis Gay-Lussac
5
Birthdate: December 6, 1778
Sun Sign: Sagittarius
Birthplace: Saint-Léonard-de-Noblat, France
Died: May 9, 1850

Known for his pathbreaking Gay-Lussac's Law, French chemist-physicist Joseph Louis Gay-Lussac was also the first, along with his colleague Alexander von Humboldt, to discover that water is composed of one part of oxygen and two parts of hydrogen. His name is one of the 72 that adorn the Eiffel Tower.

 21 
August Kekulé
(German Organic Chemist Known for His Theory of Chemical Structure and the Tetravalence of Carbon)
August Kekulé
4
Birthdate: September 7, 1829
Sun Sign: Virgo
Birthplace: Darmstadt, Germany
Died: July 13, 1896

August Kekulé was a German organic chemist. Regarded as one of the most important chemists in Europe, Kekulé is credited with founding the theory of chemical structure, including the Kekulé structure of benzene. Kekulé is also credited with teaching future Nobel Prize winners, Jacobus Henricus van 't Hoff Jr., Hermann Emil Louis Fischer, and Johann Friedrich Wilhelm Adolf von Baeyer.

 22 
Aleksandr Borodin
(Composer, Chemist)
Aleksandr Borodin
4
Birthdate: November 12, 1833
Sun Sign: Scorpio
Birthplace: Saint Petersburg
Died: February 27, 1887

Aleksandr Borodin was a Russian musical composer. He was one of the popular 19th-century group of musicians known as The Five, who worked together to create a national style of classical music. A chemist and doctor by profession, Borodin also made important contributions to organic chemistry. His best known work as a chemist is his work pertaining to organic synthesis.

Jacobus Henricus van 't Hoff
4
Birthdate: August 30, 1852
Sun Sign: Virgo
Birthplace: Rotterdam, Netherlands
Died: March 1, 1911

Jacobus Henricus van 't Hoff was a Dutch physical chemist best remembered for winning the first Nobel Prize in Chemistry. Van 't Hoff's work helped found the modern theory of chemical thermodynamics, chemical kinetics, chemical equilibrium, and chemical affinity. A highly popular theoretical chemist, Van 't Hoff is also counted among the founders of physical chemistry.

 24 
Charles Goodyear
(Inventor of Vulcanized Rubber)
Charles Goodyear
4
Birthdate: December 29, 1800
Sun Sign: Capricorn
Birthplace: New Haven, Connecticut, United States
Died: July 1, 1860

Charles Goodyear was an American manufacturing engineer and self-taught chemist who developed vulcanized rubber. He invented the chemical process to manufacture pliable, moldable, and waterproof rubber which revolutionized the automobile industry. In 1976, Charles Goodyear was inducted posthumously into the National Inventors Hall of Fame.

 25 
Wilhelm Ostwald
4
Birthdate: September 2, 1853
Sun Sign: Virgo
Birthplace: Riga
Died: April 4, 1932

Wilhelm Ostwald was a Baltic German philosopher and chemist who is credited with co-founding the field of physical chemistry. A polymath, Ostwald made significant contributions to philosophy, art, and politics, especially after his retirement from academic life. His contributions to the fields of reaction velocities, chemical equilibria, and catalysis earned him the 1909 Nobel Prize in Chemistry.

 26 
Chaim Weizmann
(Former President of Israel)
Chaim Weizmann
4
Birthdate: November 27, 1874
Sun Sign: Sagittarius
Birthplace: Motal
Died: November 9, 1952

Born in Russia, biochemist Chaim Weizmann was a World Zionist Organization leader and later also became the first president of Israel. He had a major role in the Balfour Declaration. Remembered for his research on industrial fermentation, gasoline, and rubber, he also helped establish the Weizmann Institute.

 27 
Peter Debye
(American-Dutch chemist)
Peter Debye
3
Birthdate: March 24, 1884
Sun Sign: Aries
Birthplace: Maastricht
Died: November 2, 1966
 28 
John Herschel
(British Polymath Known for His Invention of 'Blueprint')
John Herschel
4
Birthdate: March 7, 1792
Sun Sign: Pisces
Birthplace: Slough, Buckinghamshire, England
Died: May 11, 1871

The son of renowned astronomer William Herschel, John Herschel was educated at Eton and Cambridge and grew up to be a polymath. Apart from contributing to the field of photography, he was known for cataloguing and naming stars and satellites. He briefly also served as the Master of the Royal Mint.

 29 
Leo Baekeland
(Chemist & Inventor)
Leo Baekeland
3
Birthdate: November 14, 1863
Sun Sign: Scorpio
Birthplace: Sint-Martens-Latem, Belgium
Died: February 23, 1944

Industrial chemist Leo Baekeland is remembered as The Father of the Plastics Industry for creating Bakelite, the first synthetic plastic of the world, thus marking the beginning of the Polymer Age. His many inventions include Velox, a special photographic paper, the rights of which he sold to George Eastman.

 30 
Frederick Soddy
(Radiochemist)
Frederick Soddy
3
Birthdate: September 2, 1877
Sun Sign: Virgo
Birthplace: Eastbourne
Died: September 22, 1956
 31 
Joseph Swan
(Chemist, Physicist, Inventor)
Joseph Swan
4
Birthdate: October 31, 1828
Sun Sign: Scorpio
Birthplace: Sunderland
Died: May 27, 1914

Joseph Swan was an English chemist, physicist, and inventor known for being an independent early developer of a successful incandescent light bulb. He developed and supplied the first batch of incandescent lights used for illuminating houses and public buildings. He was elected a Fellow of the Royal Society (FRS) in 1894 and knighted by King Edward VII in 1904. 

 32 
John Newlands
(Chemist)
John Newlands
3
Birthdate: November 26, 1837
Sun Sign: Sagittarius
Birthplace: Lambeth, London, England
Died: July 29, 1898

Best remembered for his work on the periodic table and his law of octaves, British chemist John Newlands, was home-schooled as a kid. A significant figure in analytical chemistry, he later won the Davy Medal for his achievements. His studied were later collated in On the Discovery of the Periodic Law.

 33 
Paul Langevin
(Physicist, Professor, Chemist, Philosopher of science, Educationist, Non-fiction writer)
Paul Langevin
3
Birthdate: January 23, 1872
Sun Sign: Aquarius
Birthplace: Paris
Died: December 19, 1946

Best known for developing the Langevin dynamics and the Langevin equation, physicist Paul Langevin was also a staunch Communist. Having worked on his doctoral thesis under Pierre Curie, he had formed a connection with Curie’s wife, Marie Curie, which developed into a full-blown love affair after Pierre’s death.

 34 
Alfred Werner
(Chemist)
Alfred Werner
3
Birthdate: December 12, 1866
Sun Sign: Sagittarius
Birthplace: Mulhouse, Haut-Rhin, Alsace, France
Died: November 15, 1919

Alfred Werner was a Swiss chemist who is credited with developing the fundamental for modern coordination chemistry. In 1913, he became the first inorganic chemist to receive the prestigious Nobel Prize in Chemistry, which he won for proposing the correct configuration of transition metal complexes.

 35 
William Crookes
(British Chemist and Physicist Known for His Discovery of the Element 'Thallium' and Invention of 'Crookes Tubes')
William Crookes
3
Birthdate: June 17, 1832
Sun Sign: Gemini
Birthplace: London, England
Died: April 4, 1919

William Crookes was a British chemist and physicist remembered as a pioneer of vacuum tubes. He was the inventor of what became known as the Crookes tube. He is also credited with the discovery of the element thallium. He was the first person to describe the spectrum of terrestrial helium. He was interested in spiritualism and occultism as well. 

 36 
Hermann Staudinger
3
Birthdate: March 23, 1881
Sun Sign: Aries
Birthplace: Worms, Grand Duchy of Hesse, German Empire
Died: September 8, 1965

Hermann Staudinger was a German organic chemist whose demonstration of the existence of polymers earned him the prestigious Nobel Prize in Chemistry in 1953. He also played a key role in the development of pyrethroid insecticides as he was able to explain clearly the molecular structures of pyrethrin I and pyrethrin II. Hermann Staudinger is also credited with discovering ketenes. 

 37 
Irving Langmuir
3
Birthdate: January 31, 1881
Sun Sign: Aquarius
Birthplace: Brooklyn, New York, United States
Died: August 16, 1957

Irving Langmuir was an American physicist, chemist, and engineer. He is credited with popularizing the concentric theory of atomic structure. Irving Langmuir is also credited with inventing the hydrogen welding technique and the gas-filled incandescent lamp. In 1932, Langmuir won the Nobel Prize in Chemistry for his contribution to surface chemistry. He also won other prestigious awards like Faraday Medal.

 38 
Clara Immerwahr
3
Birthdate: June 21, 1870
Sun Sign: Gemini
Birthplace: Wojczyce, Poland
Died: May 2, 1915

Clara Immerwahr was a German chemist who became the first German woman to receive a doctorate in chemistry. Apart from being a chemist, Clara Immerwahr was also a pacifist and a women's rights activist. Her work, marriage with the popular chemist Fritz Haber, and her suicide at the age of 44 have inspired films, novels, and TV series.

 39 
Johann Wolfgang Döbereiner
(German Chemist Best Known for Inventing the First Lighter)
Johann Wolfgang Döbereiner
4
Birthdate: December 13, 1780
Sun Sign: Sagittarius
Birthplace: Hof, Germany
Died: March 24, 1849

German chemist Johann Wolfgang Döbereiner was born amid poverty but managed to get training as an apothecary. After his university education, he taught at the University of Jena. His discovery of the fact that certain chemical elements were similar later led to the development of the periodic law of chemistry.

 40 
Carl Bosch
(Chemist & Engineer)
Carl Bosch
3
Birthdate: August 27, 1874
Sun Sign: Virgo
Birthplace: Cologne, Germany
Died: April 26, 1940

Carl Bosch was a German engineer and chemist. He is credited with founding IG Farben, which went on to become one of the largest chemical companies in the world. He is also credited with developing the Haber–Bosch process, which is used even today for the production of ammonia. Carl Bosch was awarded the Nobel Prize in Chemistry in 1931.

 41 
Ernest Solvay
(Belgian Chemist Who Developed the 'Ammonia-Soda Process' for Making Soda Ash)
Ernest Solvay
3
Birthdate: April 16, 1838
Sun Sign: Aries
Birthplace: Rebecq, Belgium
Died: May 26, 1922

Belgian chemist Ernest Solvay began working in his family’s salt-making business soon after finishing school, as his condition of acute pleurisy prevented him from studying any further. He is remembered for developing the ammonia-soda process that produces soda ash, which is crucial to the glass and soap industries.

 42 
Friedlieb Ferdinand Runge
(German Analytical Chemist)
Friedlieb Ferdinand Runge
5
Birthdate: February 8, 1794
Sun Sign: Aquarius
Birthplace: Hamburg, Germany
Died: March 25, 1867

Friedlieb Ferdinand Runge was a German analytical chemist best remembered for identifying caffeine. He is also credited with identifying the mydriatic effects of belladonna extract and discovering the first coal tar dye. Friedlieb Ferdinand Runge was also the first person to observe the phenomenon of Liesegang rings in 1855.

 43 
Prafulla Chandra Ray
4
Birthdate: August 2, 1861
Sun Sign: Leo
Birthplace: Khulna
Died: June 16, 1944

Indian Bengali chemist Prafulla Chandra Ray founded the country’s first pharma company, Bengal Chemicals. Educated in Calcutta and Edinburgh, he later worked from his home, a room on the first floor of the college where he taught. Knighted for his achievements, he donated generous sums to the Brahmo Samaj initiatives.

 44 
James Dewar
(Scottish Chemist and Physicist Best Known for His Invention of the 'Vacuum Flask')
James Dewar
3
Birthdate: September 20, 1842
Sun Sign: Virgo
Birthplace: Kincardine, Scotland
Died: March 27, 1923

James Dewar was a British chemist and physicist best known for his invention of the vacuum flask. He conducted considerable research into the liquefaction of gases and atomic and molecular spectroscopy. He also wrote papers on the qualities of hydrogen and organic chemistry. He was awarded the Albert Medal of the Royal Society of Arts and the Rumford Medal. 

 45 
Albert C. Barnes
3
Birthdate: January 2, 1872
Sun Sign: Capricorn
Birthplace: Philadelphia, Pennsylvania, United States
Died: July 24, 1951
 46 
William Henry Bragg
(Physicist and Mathematician Who Invented the ‘X-Ray’ Spectrometer)
William Henry Bragg
3
Birthdate: July 2, 1862
Sun Sign: Cancer
Birthplace: Wigton, England, United Kingdom
Died: March 12, 1942

William Henry Bragg was an English physicist, chemist, and mathematician. He is best known for sharing the  1915 Nobel Prize in Physics with his son Lawrence Bragg for their work in the analysis of crystal structure by means of X-rays. William Henry Bragg had an illustrious academic career and was elected president of the Royal Society in 1935. 

 47 
Charles Pfizer
(Chemist, Entrepreneur)
Charles Pfizer
4
Birthdate: March 22, 1824
Sun Sign: Aries
Birthplace: Ludwigsburg, Germany
Died: October 19, 1906
 48 
Herbert Henry Dow
(American Chemical Industrialist and Founder of the Multinational Conglomerate 'Dow Chemical')
Herbert Henry Dow
3
Birthdate: February 26, 1866
Sun Sign: Pisces
Birthplace: Belleville, Canada
Died: October 15, 1930

Herbert Henry Dow taught chemistry before venturing into a business career. Though his first company was a failure, his work impressed investors, and he was soon able to establish Dow Chemical, which supplied low-cost bromine to the US markets. He later made auto pistons out of spare magnesium.

 49 
Walther Nernst
(Physicist and Chemist)
Walther Nernst
3
Birthdate: June 25, 1864
Sun Sign: Cancer
Birthplace: Wąbrzeźno
Died: November 18, 1941

Walther Nernst was a German chemist best remembered for his work in physical chemistry, thermodynamics, solid state physics, and electrochemistry. He is credited with formulating the Nernst heat theorem, which was in turn used in the formulation of the third law of thermodynamics. Walther Nernst received the prestigious Nobel Prize in Chemistry in the year 1920.

 50 
Adolf von Baeyer
3
Birthdate: October 31, 1835
Sun Sign: Scorpio
Birthplace: Berlin
Died: August 20, 1917

Adolf von Baeyer was a German chemist who is best known for synthesizing indigo. Interested in science from a young age,  he studied chemistry at the University of Heidelberg, where his mentor was the prominent organic chemist August Kekulé. He went on to have a successful career and received the 1905 Nobel Prize in Chemistry.