Catalog No.S4285

Ospemifene is a non-hormonal selective estrogen receptor modulator (SERM), used for the treatment of dyspareunia.

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Ospemifene Chemical Structure

Ospemifene Chemical Structure
Molecular Weight: 378.89

Validation & Quality Control

Quality Control & MSDS

Product Information

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Product Description

Biological Activity

Description Ospemifene is a non-hormonal selective estrogen receptor modulator (SERM), used for the treatment of dyspareunia.
Targets Estrogen receptor [1]
In vitro
In vivo

Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)

SpeciesMouseRatRabbitGuinea pigHamsterDog
Weight (kg)
Body Surface Area (m2)0.0070.0250.
Km factor36128520
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.

Rat dose (mg/kg) = mouse dose (22.4 mg/kg) ×  mouse Km(3)  = 11.2 mg/kg
rat Km(6)


[1] Portman DJ, et al. Menopause,2013,20(6):623-30.

Clinical Trial Information( data from http://clinicaltrials.gov, updated on 2016-07-30)

NCT Number Recruitment Conditions Sponsor
Start Date Phases
NCT02638337 Recruiting Vaginal Dryness Shionogi|Shionogi Inc. December 2015 Phase 3
NCT02784613 Recruiting Vulvovaginal Atrophy|Dyspareunia Sue Goldstein|San Diego Sexual Medicine July 2015 Phase 4
NCT00729469 Completed Atrophy|Vaginal Diseases Shionogi|Hormos Medical|QuatRx Pharmaceuticals|Shionogi Inc. July 2008 Phase 3
NCT00566982 Completed Atrophy|Vaginal Diseases Shionogi|Hormos Medical|QuatRx Pharmaceuticals|Shionogi Inc. October 2007 Phase 3
NCT00630539 Completed Atrophy|Vaginal Diseases Shionogi|Hormos Medical|QuatRx Pharmaceuticals|Shionogi Inc. August 2007 Phase 2

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Chemical Information

Download Ospemifene SDF
Molecular Weight (MW) 378.89


CAS No. 128607-22-7
Storage 3 years -20℃powder
2 years -80℃in solvent
Synonyms N/A
Solubility (25°C) * In vitro DMSO 75 mg/mL (197.94 mM)
Ethanol 71 mg/mL warming (187.38 mM)
Water <1 mg/mL
In vivo
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
Chemical Name 2-[4-[(1Z)-4-chloro-1,2-diphenyl-1-buten-1-yl]phenoxy]-ethanol

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

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