Fischer, Hans (1881-1945), a German biochemist, carried out research on the coloring matter in leaves, blood, and bile. He received the 1930 Nobel Prize in chemistry for his research into the constitution of hemin (a chemical compound contained in hemoglobin) and chlorophy II (the green coloring matter in plants), particularly for his synthesis of hemin.

Fischer was born in Hochst, Germany. His father was a dye chemist and the director of a dye manufacturing company. In 1904, Fischer received his doctorate in chemistry from the University of Marburg. He studied medicine at the University of Munich and received his M.D. degree in 1908.

Fischer worked as a research assistant for the Nobel Prize-winning chemist Emil Fischer (no relation). He then taught internal medicine and physiology in Munich.

In 1916, Fischer became a professor of medical chemistry at the University of Innsbruck. He accepted a similar position in Vienna in 1918.

In 1921, Fischer accepted a position as a professor of organic chemistry at the Technische Hochschule in Munich. He remained in this post until his death in 1945. During this tenure, Fischer conducted most of his important research on pyrroles.

Fischer developed and directed a microanalytic approach to studying chemical compounds, particularly pigments that occur in nature. This approach was very productive. Fischer's laboratory performed microanalyses of more than 60,000 chemical substances.

During World War II (1939-1945), Fischer's laboratories were almost completely destroyed in an Allied bombing raid. Despondent over the destruction of his labs and lifework, Fischer committed suicide in March 1945.