WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 558253

CAS#: 128607-22-7

Description: Ospemifene is an oral medication indicated for the treatment of dyspareunia – pain during sexual intercourse – encountered by some women, more often in those who are post-menopausal. Ospemifene is a selective estrogen receptor modulator (SERM) acting similarly to an estrogen on the vaginal epithelium, building vaginal wall thickness which in turn reduces the pain associated with dyspareunia. Dyspareunia is most commonly caused by "vulval and vaginal atrophy." The medication was approved by the FDA in February 2013. (Source: http://en.wikipedia.org/wiki/Ospemifene)

Chemical Structure

CAS# 128607-22-7

Theoretical Analysis

MedKoo Cat#: 558253
Name: Ospemifene
CAS#: 128607-22-7
Chemical Formula: C24H23ClO2
Exact Mass: 378.13866
Molecular Weight: 378.89
Elemental Analysis: C, 76.08; H, 6.12; Cl, 9.36; O, 8.45

Price and Availability

Size Price Availability Quantity
10.0mg USD 250.0 2 Weeks
25.0mg USD 350.0 2 Weeks
50.0mg USD 450.0 2 Weeks
100.0mg USD 650.0 2 Weeks
200.0mg USD 950.0 2 Weeks
500.0mg USD 1050.0 2 Weeks
1.0g USD 1250.0 2 Weeks
2.0g USD 1850.0 2 Weeks
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Synonym: Osphena

IUPAC/Chemical Name: 2-(p-((Z)-4-Chloro-1,2-diphenyl-1-butenyl)phenoxy)ethanol


InChi Code: InChI=1S/C24H23ClO2/c25-16-15-23(19-7-3-1-4-8-19)24(20-9-5-2-6-10-20)21-11-13-22(14-12-21)27-18-17-26/h1-14,26H,15-18H2/b24-23-


Appearance: Solid powder

Purity: >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).

Solubility: Soluble in DMSO.

Shelf Life: >5 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: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 378.89 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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 1: Soe LH, Wurz GT, Kao CJ, Degregorio MW. Ospemifene for the treatment of dyspareunia associated with vulvar and vaginal atrophy: potential benefits in bone and breast. Int J Womens Health. 2013 Sep 25;5:605-11. doi: 10.2147/IJWH.S39146. Review. PubMed PMID: 24109197; PubMed Central PMCID: PMC3792833.

2: Elkinson S, Yang LP. Ospemifene: first global approval. Drugs. 2013 May;73(6):605-12. doi: 10.1007/s40265-013-0046-y. Review. PubMed PMID: 23605694.

3: McCall JL, DeGregorio MW. Pharmacologic evaluation of ospemifene. Expert Opin Drug Metab Toxicol. 2010 Jun;6(6):773-9. doi: 10.1517/17425255.2010.487483. Review. PubMed PMID: 20429673.

4: Gennari L, Merlotti D, Valleggi F, Nuti R. Ospemifene use in postmenopausal women. Expert Opin Investig Drugs. 2009 Jun;18(6):839-49. doi: 10.1517/13543780902953715. Review. PubMed PMID: 19466874.

5: Gennari L. Ospemifene Hormos. Curr Opin Investig Drugs. 2004 Apr;5(4):448-55. Review. PubMed PMID: 15134288.