Carl Magnus von Hell (8 September 1849 – 11 December 1926) was the German chemist who discovered, together with Jacob Volhard and the Russian chemist Nikolay Zelinsky, the Hell–Volhard–Zelinsky halogenation reaction.
After serving in the Franco-Prussian war in 1870 he became assistant professor, and after the death of Fehling in 1883, professor for chemistry at the Technical University of Stuttgart.
His research interests have been dicarboxylic acids, aliphatic hydrocarbons and their synthesis.
He synthesized the C60H122 showing that carbon chains of up to 60 atoms are possible.
Due to an eye illness he asked for retirement in 1914.