Albert Friedrich Emil Niemann was a German chemist. In 1859 - about the same time as Paolo Mantegazza - he isolated cocaine, and he published his finding in 1860.
In the 19th century, there was a great interest among European chemists in the effects of coca leaves discovered in Latin America. In 1855 the chemistFriedrich Gaedcke had published a treatise on an extract of the coca leaf he called erythroxylin. However, little progress was made in extracting coca's active ingredients. Friedrich Wöhler, Ordinary Professor of Chemistry at Göttingen University, had coca leaves imported to Germany by Karl von Scherzer, a member of the AustrianNovara expedition, and he gave those leaves to Niemann, his graduate student, to analyze. In 1859, Niemann isolated cocaine from coca leaves. He extracted the primary alkaloid and named the ingredient "cocaine"-as with other alkaloids its name carried the “-ine” suffix. He wrote of the alkaloid's “colourless transparent prisms” and said that, “Its solutions have an alkaline reaction, a bitter taste, promote the flow of saliva and leave a peculiar numbness, followed by a sense of cold when applied to the tongue.” He published his finding in 1860 in his dissertation titled Über eine neue organische Base in den Cocablättern. This dissertation earned him his Ph.D. and was published in 1860 in the journal Archiv der Pharmazie.
Sulfur mustard
During experiments with ethylene and sulfur dichloride, Niemann documented the irritating, blister-forming properties of bis sulfide, which was later named sulfur mustard and used extensively as chemical warfare agent in World War I. He described the properties as: Sie besteht darin, daß selbst die geringste Spur, die zufallig auf irgend eine Stelle der Haut kommt, anfangs zwar keinen Schrnerz hervorruft, nach Verlauf einiger Stunden aber eine Rötung derselben bewirkt und bis zum folgenden Tage eine Brandblase hervorbringt, die sehr lange eitert und außerordentlich schwer heilt, unter Hinterlassung starker Narben.
Death
Niemann died on 19 January 1861 in his hometown Goslar, reportedly of "suppuration of the lung", probably caused by sulfur mustard poisoning. After his death, his colleague Wilhelm Lossen continued his investigations, and identified the chemical formula of cocaine in 1862.
