Thermal transformation of cholecalciferol between 100--170 degrees C. |
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Authors: | B Pelc D H Marshall |
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Affiliation: | M.R.C. Mineral Metabolism Unit, General Infirmary, Leeds LS1 3EX U.K. |
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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. |
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