title: Thermal transformation of cholecalciferol between 100--170 degrees C.
abstract: Cholecalciferol is transformed, irreversibly, to pyrocholecalciferol and isopyrocholecalciferol. The rate constant, as a function of temperature, for this transformation from the equilibrium mixture of cholecalciferol and precholecalciferol has been determined for temperatures between 100--170 degrees C and is slower than the precholecalciferol-cholecalciferol interconversion. The ratio of rates of production of pyro to isopyro derivatives is 2:1 throughout.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002762:Cholecalciferol; D006358:Hot Temperature; D007700:Kinetics
chemical_list: D002762:Cholecalciferol