Friedrich Albrecht Carl Gren (1 May 1760 – 26 November 1798) was a German chemist and a native of Bernburg.
In 1783, he became the assistant to Wenceslaus Johann Gustav Karsten at the University of Halle.
Today, it is the oldest and one of the best-known journals on physics.
He was also the author of a popular textbook on chemistry titled Systematisches Handbuch der gesamten Chemie.
After Antoine-Laurent Lavoisier (1743-1794) demonstrated that combustion required oxygen, he compromised his beliefs, and postulated that oxygen and phlogiston worked alongside each other.