M8046 Sigma



Synonym: 11β-(4-Dimethyl­amino)­phenyl-17β-hydroxy-17-(1-propynyl)­estra-4,9-dien-3-one, RU-38486, RU-486



Related Categories Antitumor Agents, Approved Therapeutics/Drug Candidates, Bioactive Small Molecule Alphabetical Index, Bioactive Small Molecules, Cancer Research,
assay   ≥98%
originator   Danco Laboratories
storage temp.   2-8°C
Gene Information   human ... AR(367), ESR1(2099), ESR2(2100), HTR1A(3350), HTR1B(3351), HTR1D(3352), HTR1E(3354), HTR1F(3355), HTR2A(3356), HTR2B(3357), HTR2C(3358), HTR3A(3359), HTR3B(9177), HTR3C(170572), HTR3D(200909), HTR3E(285242), HTR4(3360), HTR5A(3361), HTR5B(645694), HTR6(3362), HTR7(3363), NR3C1(2908), NR3C2(4306), PGR(5241)
mouse ... Nr3c1(14815)
rat ... Nr3c1(24413), Tat(24813)


Biochem/physiol Actions

Mifepristone (RU-486) has activity as both a progesterone receptor antagonist and a glucocorticoid receptor antagonist.


1 g in glass bottle

100, 500 mg in glass bottle

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 Danco Laboratories. 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

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Safety & Documentation

Safety Information

GHS08  GHS08
Signal word 
Hazard statements 
Precautionary statements 
NONH for all modes of transport
WGK Germany 

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option:
What is Mifepristone, Product M8046, soluble in?
Mifepristone is soluble in ethanol at 50 mg/mL; heat may be required to dissolve the compound at this concentration.  It is also soluble in DMSO at 20 mg/mL.
Can solutions of Mifepristone, Product M8046, be stored?
Stock solutions of 1 mM mifepristone in ethanol can be stored at -20 °C. The top of the container should be sealed with Parafilm to prevent solvent evaporation. Solutions in ethanol, properly stored and handled, are probably good for several months (based on the structure of the compound), but we have no specific information on this.
Where can I find information on usage of Mifepristone, Product M8046?
The Sigma-Aldrich website listing has several cited articles with hyperlinks to the abstracts. These references can be found under the reference tab on the M8046 product webpage. There is also a product information sheet (see link on the webpage) with properties and usage. Here is that link:
How do I find price and availability?
There are several ways to find pricing and availability for our products.  Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers. 
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS. To access the shipping information for this material, use the link on the product detail page for the product, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
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