Elacestrant (Synonyms: RAD1901)

Name: Elacestrant
Brand: MedChemExpress
SKU: HY-19822
Rating: 5.0 (17 reviews)

Cat. No.: HY-19822 Purity: 99.38%: Data Sheet
COA

SDS
Handling Instructions
FAQs
Technical Support

Elacestrant (RAD1901) is an orally available and selective estrogen receptor degrader (SERD) with IC₅₀s of 48 and 870 nM for ERα and ERβ, respectively. Elacestrant also can inhibit growth of ER⁺ breast cancer cell lines in vitro and in vivo.

For research use only. We do not sell to patients.

CAS No. : 722533-56-4

Size	Stock	Quantity
Solid + Solvent (Highly Recommended)
10 mM * 1 mL in DMSO ready for reconstitution	In-stock	Estimated Time of Arrival: December 31
Solution
10 mM * 1 mL in DMSO	In-stock	Estimated Time of Arrival: December 31
Solid
1 mg	In-stock	Estimated Time of Arrival: December 31
5 mg	In-stock	Estimated Time of Arrival: December 31
10 mg	In-stock	Estimated Time of Arrival: December 31
25 mg	In-stock	Estimated Time of Arrival: December 31
50 mg	In-stock	Estimated Time of Arrival: December 31
100 mg	In-stock	Estimated Time of Arrival: December 31
200 mg	Get quote
500 mg	Get quote

or Bulk Inquiry

* Please select Quantity before adding items.

This product is a controlled substance and not for sale in your territory.

Customer Review

Based on 17 publication(s) in Google Scholar

Other Forms of Elacestrant:

Elacestrant (S enantiomer) In-stock
Elacestrant dihydrochloride In-stock
Elacestrant S enantiomer dihydrochloride Get quote
Elacestrant-d₄ Get quote
Elacestrant-d₄-1 Get quote
Elacestrant-d₁₀ Get quote
Elacestrant-d₆ Get quote
Elacestrant-d₅ Get quote

17 Publications Citing Use of MCE Elacestrant

Flow Cytometry

Cell Imaging/Staining

RT-PCR

: Elacestrant purchased from MedChemExpress. Usage Cited in: Genes Dev. 2025 Nov 5. [Abstract]; Elacestrant (3 µM; 48 h) induced G1 arrest of PEO1 cells stably infected with pLKO.1 and shp53.

: Elacestrant purchased from MedChemExpress. Usage Cited in: Genes Dev. 2025 Nov 5. [Abstract]; Elacestrant (3 µM) inhibited the viability of PEO1-pLKO.1 and PEO1-shp53 cells grown as organoids.

: Elacestrant purchased from MedChemExpress. Usage Cited in: Genes Dev. 2025 Nov 5. [Abstract]; Elacestrant (3 µM; 48 h) led to an increase in p27Kip1 protein levels in PEO1 cells transfected with siNC or sip53.

: Elacestrant purchased from MedChemExpress. Usage Cited in: Genes Dev. 2025 Nov 5. [Abstract]; qPCR analysis of CDKN1B expression in PEO1 cells transfected with siNC or sip53 and treated with Elacestrant (3 µM; 48 h).

: Elacestrant purchased from MedChemExpress. Usage Cited in: Genes Dev. 2025 Nov 5. [Abstract]; Elacestrant (3 µM; 48 h) arrested dramatic G1 in shp53 PEO1 cells transfected with siNC.

Featured Recommendations

•Related Screening Libraries:

•Related Small Molecules:

•Related Proteins:

View All Estrogen Receptor/ERR Isoform Specific Products:

View All Isoforms

Estrogen receptor ERα ERβ ERRα ERRβ ERRγ

Biological Activity
Purity & Documentation
References
Customer Review

Description

IC₅₀ & Target

IC50: 48 nM (ERα), 870 nM (ERβ)^[1]

Cellular Effect

Cell Line	Type	Value	Description	References
MCF7	EC₅₀	0.6 nM Compound: 1; RAD1901	Downregulation of ER expression in human MCF7 cells incubated for 48 hrs by ELISA Downregulation of ER expression in human MCF7 cells incubated for 48 hrs by ELISA	[PMID: 37163948]
MCF7	GI₅₀	0.028 nM Compound: RAD1901; 9	Inhibition of cell growth in human MCF7 cells after 4 days by wst-8-based colorimetric analysis Inhibition of cell growth in human MCF7 cells after 4 days by wst-8-based colorimetric analysis	[PMID: 30990042]
MCF7	IC₅₀	4.2 nM Compound: 1; RAD1901	Antiproliferative activity against estradiol-stimulated human MCF7 cells incubated for 48 hrs by CellTiter Glo assay Antiproliferative activity against estradiol-stimulated human MCF7 cells incubated for 48 hrs by CellTiter Glo assay	[PMID: 37163948]
MCF7	IC₅₀	4.2 nM Compound: 45; RAD1901	Antiproliferative activity against human MCF7 cells assessed as reduction in cell proliferation Antiproliferative activity against human MCF7 cells assessed as reduction in cell proliferation	[PMID: 33138369]
MCF7	IC₅₀	4.2 μM Compound: 8; RAD1901	Antiproliferative activity against human MCF7 cells assessed as reduction in cell viability Antiproliferative activity against human MCF7 cells assessed as reduction in cell viability	[PMID: 37019030]

In Vitro

Elacestrant (RAD1901; 0.5 nM-10 µM; 48 h) exhibits dose-dependent inhibition of ERα expression, with a EC₅₀ of 0.6 nM in MCF-7 cells^[1].
Elacestrant (0-1 µM; 48 h) inhibits proliferation of Estradiol (E2)-stimulated MCF-7 cells in a dose-dependent manner, with an EC₅₀ of 4 pM^[1].
Elacestrant (0-1 µM; 24 or 48 h) results in a dose-dependent and marked decrease in estrogen receptor protein expression in MCF7, T47D, and HCC1428 cells^[2].
Elacestrant (0.01, 0.1, 1.0 µM) decreases expression of progesterone receptor (PGR, PR; an ER target gene), in both MCF7 and T47D cell lines^[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Cell Proliferation Assay^[1]

Cell Line:	ER-positive MCF-7 cells (Estradiol (E2)-stimulated)^[1]
Concentration:	0-1 µM
Incubation Time:	48 h
Result:	Showed antiproliferative activity on cells.

Western Blot Analysis^[1]

Cell Line:	MCF-7 cells
Concentration:	0.5 nM-10 µM
Incubation Time:	48 h
Result:	Inhibited ERα expression (EC₅₀ of 0.6 nM) in a dose-dependent manner.

Western Blot Analysis^[2]

Cell Line:	MCF7, T47D, and HCC1428 cells
Concentration:	0-1 µM
Incubation Time:	24 or 48 h
Result:	Decreased the expression of estrogen receptor protein.

In Vivo

Elacestrant (0.3-120 mg/kg; p.o.; single daily for 40 days) antagonizes E2-mediated uterine stimulation in a dose-dependent manner in vivo^[1].
Elacestrant (30, 60 mg/kg; p.o.; single daily for 4 weeks) induces complete tumor growth inhibition in mice^[2].
Tumor growth inhibition is maintained for 4 weeks after Elacestrant withdrawal^[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model:	MCF7 cell line xenograft model of mice^[2].
Dosage:	30, 60 mg/kg
Administration:	Oral administration; single daily for 4 weeks.
Result:	Inhibited growth of tumor.

Clinical Trial

Molecular Weight

458.63

Formula

C₃₀H₃₈N₂O₂

CAS No.

722533-56-4

Appearance

Solid

Color

White to off-white

SMILES

OC1=CC=C2C[C@H](C3=CC=C(OC)C=C3N(CC)CC4=CC=C(CCNCC)C=C4)CCC2=C1

Shipping

Room temperature in continental US; may vary elsewhere.

Storage

4°C, sealed storage, away from moisture and light

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)

Solvent & Solubility

In Vitro:

DMSO : 160 mg/mL (348.87 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions

Concentration Solvent Mass	1 mg	5 mg	10 mg

1 mM	2.1804 mL	10.9020 mL	21.8041 mL
5 mM	0.4361 mL	2.1804 mL	4.3608 mL
10 mM	0.2180 mL	1.0902 mL	2.1804 mL

View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Molarity Calculator
Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Concentration _(start) × Volume _(start) = Concentration _(final) × Volume _(final)

This equation is commonly abbreviated as: C₁V₁ = C₂V₂

Concentration _(start)

Volume _(start)

Concentration _(final)

Volume _(final)

In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

Protocol 1

Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 4 mg/mL (8.72 mM); Clear solution

This protocol yields a clear solution of ≥ 4 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (40.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Protocol 2

Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: ≥ 4 mg/mL (8.72 mM); Clear solution

This protocol yields a clear solution of ≥ 4 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (40.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
Protocol 3

Add each solvent one by one: 10% DMSO 90% Corn Oil
Solubility: ≥ 4 mg/mL (8.72 mM); Clear solution

This protocol yields a clear solution of ≥ 4 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (40.0 mg/mL) to 900 μL Corn oil, and mix evenly.

In Vivo Dissolution Calculator

Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.

Please enter your animal formula composition:

DMSO +

Tween-80 +

Saline

Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.

The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).

Calculation results:

Working solution concentration: mg/mL

Method for preparing stock solution: mg drug dissolved in μL DMSO (Stock solution concentration: mg/mL).

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)

The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).

Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.

If the continuous dosing period exceeds half a month, please choose this protocol carefully.

Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.

Purity & Documentation

Purity: 99.38%

Select Batch:

Data Sheet (278 KB) SDS (393 KB)

COA (248 KB) HNMR (144 KB) RP-HPLC (250 KB) LCMS (108 KB)

Handling Instructions (2659 KB)

References

[1]. Garner F, et al. RAD1901: a novel, orally bioavailable selective estrogen receptor degrader that demonstrates antitumor activity in breast cancer xenograft models. Anticancer Drugs. 2015 Oct;26(9):948-56. [Content Brief]

[2]. Bihani T, et al. Elacestrant (RAD1901), a Selective Estrogen Receptor Degrader (SERD), Has Antitumor Activity in Multiple ER+ Breast Cancer Patient-derived Xenograft Models. Clin Cancer Res. 2017 Aug 15;23(16):4793-4804. [Content Brief]

Complete Stock Solution Preparation Table

Optional Solvent	Concentration Solvent Mass	1 mg	5 mg	10 mg	25 mg

DMSO	1 mM	2.1804 mL	10.9020 mL	21.8041 mL	54.5102 mL
	5 mM	0.4361 mL	2.1804 mL	4.3608 mL	10.9020 mL
	10 mM	0.2180 mL	1.0902 mL	2.1804 mL	5.4510 mL
	15 mM	0.1454 mL	0.7268 mL	1.4536 mL	3.6340 mL
	20 mM	0.1090 mL	0.5451 mL	1.0902 mL	2.7255 mL
	25 mM	0.0872 mL	0.4361 mL	0.8722 mL	2.1804 mL
	30 mM	0.0727 mL	0.3634 mL	0.7268 mL	1.8170 mL
	40 mM	0.0545 mL	0.2726 mL	0.5451 mL	1.3628 mL
	50 mM	0.0436 mL	0.2180 mL	0.4361 mL	1.0902 mL
	60 mM	0.0363 mL	0.1817 mL	0.3634 mL	0.9085 mL
	80 mM	0.0273 mL	0.1363 mL	0.2726 mL	0.6814 mL
	100 mM	0.0218 mL	0.1090 mL	0.2180 mL	0.5451 mL

Elacestrant Related Classifications

Help & FAQs

Do most proteins show cross-species activity?
Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

Elacestrant722533-56-4RAD1901RAD 1901RAD-1901Estrogen Receptor/ERRbreast cancerERestrogen receptorMCF7 cellsT47D cellsHCC1428 cellsInhibitorinhibitorinhibit

Your Recently Viewed Products:

Product Name

Requested Quantity *

Applicant Name *

Salutation

Email Address *

Phone Number *

Department

Organization Name *

City

State

Country or Region *

Remarks

Product Name

Lot #

Applicant Name *

Email Address *

Phone Number

Department *

Organization Name *

Country or Region *

Remarks

Name
Email *

	Sorry, but the email address you supplied was invalid.

Elacestrant (Synonyms: RAD1901)

Customer Review

Other Forms of Elacestrant:

Elacestrant Related Antibodies

17 Publications Citing Use of MCE Elacestrant

Featured Recommendations

•Related Screening Libraries:

•Related Small Molecules:

•Related Proteins:

View All Estrogen Receptor/ERR Isoform Specific Products:

Biological Activity

Purity & Documentation

References

Customer Review

Elacestrant Related Antibodies

Molarity Calculator

Dilution Calculator

Complete Stock Solution Preparation Table

Elacestrant Related Classifications

Keywords:

Your Recently Viewed Products:

Customer Review

Request for HNMR Report

SAFETY DATA SHEET (SDS)

Request for HNMR Report