A
- Atul Kumar, (Born 1963), Indian chemist
- Emil Abderhalden, (1877–1950), Swiss chemist
- Richard Abegg, (1869–1910), German chemist
- Frederick Abel, (1827–1902), English chemist
- Friedrich Accum, (1769–1838),German chemist, advances in the field of gas lighting
- Homer Burton Adkins, (1892–1949), American chemist, known for work in hydrogenation of organic compounds
- Peter Agre, (1949-), American chemist and doctor, 2003 Nobel Prize in Chemistry
- Georgius Agricola, (1494–1555), German scholar known as "the father of mineralogy"
- Arthur Aikin, (1773–1855), English chemist and mineralogist
- Adrien Albert, (1907–1989), Australian Medicinal Chemist
- Kurt Alder, (1902–1958), German chemist, 1950 Nobel Prize in Chemistry
- Sidney Altman, (1939-), 1989 Nobel Prize in Chemistry
- Christian B. Anfinsen, (1916–1995), 1972 Nobel Prize in Chemistry
- Angelo Angeli, an Italian Chemist
- Anthony Joseph Arduengo, III, an American Chemist
- Johan August Arfwedson, (1792–1841), Swedish chemist
- Anton Eduard van Arkel, (1893–1976), Dutch chemist
- Svante Arrhenius, (1859–1927), Swedish chemist, one of the founders of physical chemistry
- Francis William Aston, (1877–1945), 1922 Nobel Prize in Chemistry
- Amedeo Avogadro,(1776–1856), Italian chemist and physicist, discovered and Avogadro's law
Read more about this topic: List Of Chemists