Karl Wilhelm Gottlob Kastner (31 October 1783 – 13 July 1857) was a German chemist, natural scientist[2] and a professor of physics and chemistry.
In 1812 to 1813 he interrupted his teaching activities to make voluntary military service as supervisor and doctor of four hospitals.
In 1821 he moved on again, partly for political reasons, to the University of Erlangen, where he remained for the remainder of his professional life.
Kastner also helped Liebig receive a grant from Ludwig I, the Grand Duke of Hesse-Darmstadt, to study under Gay-Lussac in Paris.
Many of Kastner's academic positions required not only the teaching of chemistry, but also mathematics, zoology, physics, mineralogy, geology, and pharmacy.