Ernst Felix Immanuel Hoppe-Seyler (born December 26, 1825 in Freyburg an der Unstrut, Germany; died August 10, 1895 in Wasserburg/Bodensee) was a German physiologist and chemist.

His numerous investigations include studies of blood, hemoglobin, pus, bile, milk, and urine. His work led to advances in organic chemistry by his pupils and by Paul Ehrlich. He wrote Physiological Chemistry.

1825 births | 1895 deaths | Natives of Saxony-Anhalt | German chemists | German physiologists | Felix Hoppe-Seyler