CAS 73837-24-8: (6R)-6-[(1R,4E,7aR)-4-[(2Z)-2-[(3S,5R)-3,5-bis[[tert-butyl(dimethyl)silyl]oxy]-2-methylene-cyclohexylidene]ethylidene]-7a-methyl-2,3,3a,5,6,7-hexahydro-1H-inden-1-yl]-2-methyl-heptan-2-ol

Calcitriol Impurities A refers to the contaminants found in Calcitriol, the hormonally active metabolite of vitamin D3, which serves to activate the vitamin D receptor.

Calcitriol is a vitamin D metabolite that has an important role in bone health. Calcitriol can be quantified by measuring the amount of calcium that is bound to the molecule. This is done using a detector, which detects the emission of light from the calcitriol. The average recovery value for calcitriol was found to be 98%. The diode array spectrometer and mass spectrometer are used to measure the amount of light emitted and identify specific peaks. A workstation is used to analyze data collected by the detector and chromatographic analysis, respectively. The stability tests were conducted to determine how long calcitriol stays stable at various temperatures.

Applications An impurity of Calcitriol (C144500). The trans isomer of Calcitriol. Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package References Myrtle, J.F., et al.: J. Biol. Chem., 245, 1190 (1970), Lawson, D.E.M., et al.: Nature, 230, 228 (1971), Norman, A.W., et al.: Science, 173, 51 (1971), Suda, T., et al.: Vitamins, 45, 175 (1972), Muindi, J.R., et al.: Clin. Pharmacol. Ther., 72, 648 (2002),