Raloxifene hydrochloride


LY 156758, Keoxifene hydrochloride, [6-Hydroxy-2-(4-hydroxyphenyl)benzo[b]thien-3-yl][4-[2-(1-piperidinyl)ethoxy]phenyl]methanone hydrochloride
Empirical Formula (Hill Notation):
C28H27NO4S · HCl
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:
Pricing and availability is not currently available.

Quality Level




light yellow


DMSO: soluble 28 mg/mL
H2O: insoluble


Eli Lilly

SMILES string




InChI key


Gene Information

human ... ESR2(2100)

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Raloxifene hydrochloride has been used:
  • as a competitive inhibitors for estrogen receptor α in breast cancer cells
  • as an anti-resorptive agents to test its effect on improving bone mineral density (BMD) in six-month-old female ovariectomized rats
  • to test effect on viability of esophageal adenocarcinoma cells


500 mg in poly bottle
1 g in poly bottle

Biochem/physiol Actions

Raloxifene is benzothiophene compound and is used in treating postmenopausal osteoporosis It comparatively induces lesser risk in developing thromboembolic events and cataracts compared to tamoxifen. Raloxifene also interacts with estrogen receptors and plasma proteins.
Raloxifene is a selective estrogen receptor modulator (SERM); acts as an anti-estrogen in both breast and uterine tissue while being estrogenic in bone. May have efficacy against estrogen-sensitive cancers.

Features and Benefits

This compound is also offered as part of Sigma′s Library of Pharmacologically Active Compounds (LOPAC®1280), a biologically annotated collection of high-quality, ready-to-screen compounds. Click here to learn more.
This compound is featured on the Nuclear Receptors (Steroids) page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.
This compound was developed by Eli Lilly. To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here.

Legal Information

LOPAC is a registered trademark of Sigma-Aldrich Co. LLC

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Effects of chemotherapy agents on Sphingosine-1-Phosphate receptors expression in MCF-7 mammary cancer cells
Ghosal P, et al.
Biomedicine and Pharmacotherapy, 81, 218-224 (2016)
Moen MD, et al.
Drugs (2008)
The SERM/SERD bazedoxifene disrupts ESR1 helix 12 to overcome acquired hormone resistance in breast cancer cells
Fanning SW, et al.
eLife, 7, e37161-e37161 (2018)
Raloxifene: a selective estrogen receptor modulator (SERM) with multiple target system effects
Muchmore DB
Oncologist, 5(5), 388-392 (2000)
Effect of osteoporosis treatment agents on the cortical bone osteocyte microenvironment in adult estrogen-deficient, osteopenic rats
Stern AR, et al.
BoneKEy reports, 8, 115-124 (2018)

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