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MedKoo CAT#: 315127

CAS#: 41294-56-8

Description: Alfacalcidol is an active metabolite of Vitamin D, which performs important functions in regulation of the calcium balance and the bone metabolism. Alfacalcidol is Vitamin D-hormone analog which is activated by the enzyme 25-hydroxylase in the liver for systemic and in osteoblasts for local D-hormone actions. It possesses a unique pattern of pleiotropic effects on, e.g. gut, bone, pararthyroids, muscle and brain. Alfacalcidol is superior to plain vitamin D (cholecalciferol) because the final kidney activation of the latter is regulated by a negative feedback mechanism.

Price and Availability

Size Price Shipping out time Quantity
10mg USD 350 2 Weeks
25mg USD 650 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2020-08-12. Prices are subject to change without notice.

Alfacalcidol purity > 98%, is in stock. Current shipping out time is about 2 weeks after order is received. CoA, QC data and MSDS documents are available in one week after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 315127
Name: Alfacalcidol
CAS#: 41294-56-8
Chemical Formula: C27H44O2
Exact Mass: 400.33413
Molecular Weight: 400.63706
Elemental Analysis: C, 80.94; H, 11.07; O, 7.99


IUPAC/Chemical Name: (1R,3S,5Z)-5-[(2E)-2-[(1R,3aS,7aR)-7a-methyl-1-[(2R)-6-methylheptan-2-yl]-2,3,3a,5,6,7-hexahydro-1H-inden-4-ylidene]ethylidene]-4-methylidenecyclohexane-1,3-diol


InChi Code: InChI=1S/C27H44O2/c1-18(2)8-6-9-19(3)24-13-14-25-21(10-7-15-27(24,25)5)11-12-22-16-23(28)17-26(29)20(22)4/h11-12,18-19,23-26,28-29H,4,6-10,13-17H2,1-3,5H3/b21-11+,22-12-


Technical Data

Solid powder

>98% (or refer to the Certificate of Analysis)

Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition:
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Soluble in DMSO.

Shelf Life:
>2 years if stored properly

Drug Formulation:
This drug may be formulated in DMSO

Stock Solution Storage:
0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code:


1: Von Schacht E, Dambacher MA, Ringe JD, Dukas L. [Combination of alendronate plus alfacalcidol in the treatment of osteoporosis. Rationale, preclinical data and clinical evidence]. MMW Fortschr Med. 2012 Apr 5;154 Suppl 1:10-21. Review. German. PubMed PMID: 23427364.

2: Fukui T, Munemura C, Maeta S, Ishida C, Murawaki Y. The Effects of Olmesartan and Alfacalcidol on Renoprotection and klotho Gene Expression in 5/6 Nephrectomized Spontaneously Hypertensive Rats. Yonago Acta Med. 2011 Sep;54(3):49-58. Epub 2011 Sep 1. Review. PubMed PMID: 24031129; PubMed Central PMCID: PMC3763788.

3: Kubodera N. D-hormone derivatives for the treatment of osteoporosis: from alfacalcidol to eldecalcitol. Mini Rev Med Chem. 2009 Oct;9(12):1416-22. Review. PubMed PMID: 19929815.

4: Kubodera N. A new look at the most successful prodrugs for active vitamin D (D hormone): alfacalcidol and doxercalciferol. Molecules. 2009 Sep 29;14(10):3869-80. doi: 10.3390/molecules14103869. Review. PubMed PMID: 19924035.

5: O'Donnell S, Moher D, Thomas K, Hanley DA, Cranney A. Systematic review of the benefits and harms of calcitriol and alfacalcidol for fractures and falls. J Bone Miner Metab. 2008;26(6):531-42. doi: 10.1007/s00774-008-0868-y. Epub 2008 Nov 1. Review. PubMed PMID: 18979152.

6: Saito M. [Assessment of bone quality. Effects of bisphosphonates, raloxifene, alfacalcidol, and menatetrenone on bone quality: collagen cross-links, mineralization, and microdamage]. Clin Calcium. 2008 Mar;18(3):364-72. doi: CliCa0803364372. Review. Japanese. PubMed PMID: 18310825.

7: Ringe JD, Schacht E. Improving the outcome of established therapies for osteoporosis by adding the active D-hormone analog alfacalcidol. Rheumatol Int. 2007 Dec;28(2):103-11. Epub 2007 Aug 1. Review. PubMed PMID: 17668216.

8: Rosery H, Bergemann R, Marx SE, Boehnke A, Melnick J, Sterz R, Williams L. Health-economic comparison of paricalcitol, calcitriol and alfacalcidol for the treatment of secondary hyperparathyroidism during haemodialysis. Clin Drug Investig. 2006;26(11):629-38. Review. PubMed PMID: 17163297.

9: Schacht E, Richy F, Reginster JY. The therapeutic effects of alfacalcidol on bone strength, muscle metabolism and prevention of falls and fractures. J Musculoskelet Neuronal Interact. 2005 Jul-Sep;5(3):273-84. Review. PubMed PMID: 16172518.

10: Scharla SH, Schacht E, Lempert UG. Alfacalcidol versus plain vitamin D in inflammation induced bone loss. J Rheumatol Suppl. 2005 Sep;76:26-32. Review. PubMed PMID: 16142848.