acid was first isolated from potassium tartrate, known to the ancients as tartar,
c. 800 by the Persian alchemist Jabir ibn Hayyan, who was also responsible for
numerous other basic chemical processes still in use today. The modern process
was developed in 1769 by the Swedish chemist Carl Wilhelm Scheele. The chirality
of tartaric acid was discovered in 1832 by Jean Baptiste Biot, who observed its
ability to rotate polarized light. Louis Pasteur continued this research in 1847
by investigating the shapes of tartaric acid crystals, which he found to be asymmetric.
Pasteur was the first to produce a pure sample of levotartaric acid.