Hilaire Rouelle
Hilaire Marin Rouelle was an 18th-century French chemist. Commonly cited as the 1773 discoverer of urea, he was not the first to do so. Dutch scientist Herman Boerhaave had discovered this chemical as early as 1727. Rouelle is known as "le cadet" to distinguish him from his older brother, Guillaume-François Rouelle, who was also a chemist.
