calcitriol and its Impurities
Calcitriol is used to treat hyperparathyroidism and metabolic bone disease in people who have chronic kidney failure and are not receiving dialysis. It is the active form of vitamin D, normally made in the kidney.. Reference standards of Calcitriol API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below


26,27-Didesmethyl-1,3-(tert-butyldimethylsilyl) (5E)-Calcitriol 24-Carboxylic Acid Methyl Ester
26,27-Didesmethyl-1,3-(tert-butyldimethylsilyl) (5E)-Calcitriol 24-Carboxylic Acid Methyl Ester
Catalogue No.:PA STI 030910
CAS :
161885-78-5
Molecular Formula : C38H68O4Si2
Molecular Weight : 645.12


(1R,3S,Z)-5-(2-((1R,3aS,7aR,Z)-1-((R)-6-Hydroxy-6-methylheptan-2-yl)-7a-methyloctahydro-4H-inden-4-ylidene)ethylidene)-4-methylenecyclohexane-1,3-diol
(1R,3S,Z)-5-(2-((1R,3aS,7aR,Z)-1-((R)-6-Hydroxy-6-methylheptan-2-yl)-7a-methyloctahydro-4H-inden-4-ylidene)ethylidene)-4-methylenecyclohexane-1,3-diol
Catalogue No.:PA 03 0881006
CAS :
157809-60-4
Molecular Formula : C27H44O3
Molecular Weight : 416.65


(1R,3S,E)-5-(2-((1R,3aS,7aR,Z)-1-((R)-6-Hydroxy-6-methylheptan-2-yl)-7a-methyloctahydro-4H-inden-4-ylidene)ethylidene)-4-methylenecyclohexane-1,3-diol
(1R,3S,E)-5-(2-((1R,3aS,7aR,Z)-1-((R)-6-Hydroxy-6-methylheptan-2-yl)-7a-methyloctahydro-4H-inden-4-ylidene)ethylidene)-4-methylenecyclohexane-1,3-diol
Catalogue No.:PA 03 0881007
CAS :
157809-61-5
Molecular Formula : C27H44O3
Molecular Weight : 416.65


(1R,3S)-5-(2-((1R,3aS,7aR)-1-((R)-6-Hydroxy-6-methylheptan-2-yl)-7a-methyloctahydro-4H-inden-4-ylidene)ethylidene)-4-methylenecyclohexane-1,3-diol
(1R,3S)-5-(2-((1R,3aS,7aR)-1-((R)-6-Hydroxy-6-methylheptan-2-yl)-7a-methyloctahydro-4H-inden-4-ylidene)ethylidene)-4-methylenecyclohexane-1,3-diol
Catalogue No.:PA 03 0881008
CAS :
142864-52-6
Molecular Formula : C27H44O3
Molecular Weight : 416.65


(2R,2aS,3aR,3bR,3cS,5aR,6R,8aR)-6-((R)-6-Hydroxy-6-methylheptan-2-yl)-3b,5a-dimethyl-2,2a,3a,3b,3c,4,5,5a,6,7,8,8a-dodecahydro-1H-cyclopenta[7,8]phenanthro[3,4-b]oxiren-2-ol
(2R,2aS,3aR,3bR,3cS,5aR,6R,8aR)-6-((R)-6-Hydroxy-6-methylheptan-2-yl)-3b,5a-dimethyl-2,2a,3a,3b,3c,4,5,5a,6,7,8,8a-dodecahydro-1H-cyclopenta[7,8]phenanthro[3,4-b]oxiren-2-ol
Catalogue No.:PA 03 0881009
CAS :
151546-04-2
Molecular Formula : C27H42O3
Molecular Weight : 414.63