Determine the necessary mass, volume, or concentration for preparing a solution.
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Moligand™, ≥98% Moligand™ for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Protected from light,Room temperature,Argon charged Ships Normal Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 58 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
17α-Ethynylestradiol (EE2) is a synthetic hormone. It is a derivative of estradiol (E2). It is implicated in estrogen replacement therapy and suspension of breastfeeding. EE2 is used to treat osteoporosis, menopausal and postmenopausal syndrome. It is also used to treat prostatic cancer and breast cancer in postmenopausal women. EE2 functions as an endocrine-disrupting chemical (EDC).
Application
17α-Ethynylestradiol has been used to study the effect of exogenous estrogen and selective estrogen receptor modulator (SERM) in rats. It also has been used to increase the concentration of low density lipoprotein (LDL) receptor in rabbit liver.
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA →Full quality attributes and acceptance criteria for this grade.
View spec sheet →Taxonomy Tree
| Kingdom | Organic compounds |
|---|---|
| Superclass | Lipids and lipid-like molecules |
| Class | Steroids and steroid derivatives |
| Subclass | Estrane steroids |
| Intermediate Tree Nodes | Not available |
| Direct Parent | Estrogens and derivatives |
| Alternative Parents | 3-hydroxysteroids 17-hydroxysteroids Phenanthrenes and derivatives Tetralins 1-hydroxy-2-unsubstituted benzenoids Ynones Tertiary alcohols Cyclic alcohols and derivatives Acetylides Hydrocarbon derivatives |
| Molecular Framework | Aromatic homopolycyclic compounds |
| Substituents | Estrogen-skeleton - 3-hydroxysteroid - Hydroxysteroid - 17-hydroxysteroid - Phenanthrene - Tetralin - 1-hydroxy-2-unsubstituted benzenoid - Benzenoid - Ynone - Cyclic alcohol - Tertiary alcohol - Acetylide - Organic oxygen compound - Organooxygen compound - Hydrocarbon derivative - Alcohol - Aromatic homopolycyclic compound |
| Description | This compound belongs to the class of organic compounds known as estrogens and derivatives. These are steroids with a structure containing a 3-hydroxylated estrane. |
| External Descriptors | C18 steroids (estrogens) and derivatives |
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Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Date | Item |
|---|---|---|---|
| Certificate of Analysis | Sep 22, 2026 | E129595 | |
| Certificate of Analysis | Sep 22, 2026 | E129595 | |
| Certificate of Analysis | Apr 23, 2026 | E129595 | |
| Certificate of Analysis | Apr 23, 2026 | E129595 | |
| Certificate of Analysis | Apr 23, 2026 | E129595 | |
| Certificate of Analysis | Oct 29, 2025 | E129595 | |
| Certificate of Analysis | Jul 25, 2025 | E129595 | |
| Certificate of Analysis | Jul 25, 2025 | E129595 | |
| Certificate of Analysis | Jul 25, 2025 | E129595 | |
| Certificate of Analysis | Jun 28, 2025 | E129595 | |
| Certificate of Analysis | Jan 13, 2025 | E129595 | |
| Certificate of Analysis | Jan 13, 2025 | E129595 | |
| Certificate of Analysis | Jan 13, 2025 | E129595 | |
| Certificate of Analysis | Jan 13, 2025 | E129595 | |
| Certificate of Analysis | Nov 14, 2024 | E129595 | |
| Certificate of Analysis | Nov 06, 2024 | E129595 | |
| Certificate of Analysis | Jul 01, 2024 | E129595 | |
| Certificate of Analysis | Jun 15, 2024 | E129595 | |
| Certificate of Analysis | Jun 15, 2024 | E129595 | |
| Certificate of Analysis | Feb 13, 2023 | E129595 | |
| Certificate of Analysis | Jan 09, 2023 | E129595 | |
| Certificate of Analysis | Jul 23, 2022 | E129595 | |
| Certificate of Analysis | Jul 23, 2022 | E129595 |
| Solubility | Soluble in ethanol (59 mg/ml at 25 °C), DMF (~20 mg/ml), DMSO (59 mg/ml at 25 °C), water (0.01 mg/ml at 27 °C), and methanol. |
|---|---|
| Sensitivity | light sensitive;Air sensitive |
| x_specific_rotation | -30° (C=0.4,Pyridine) |
| x_melt_point_char | 181.0 - 185.0°C |
| Molecular Weight | 296.400 g/mol |
| XLogP3 | 3.700 |
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 2 |
| Rotatable Bond Count | 1 |
| Exact Mass | 296.178 Da |
| Monoisotopic Mass | 296.178 Da |
| Topological Polar Surface Area | 40.500 Ų |
| Heavy Atom Count | 22 |
| Formal Charge | 0 |
| Complexity | 505.000 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 5 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 0 |
| Covalently-Bonded Unit Count | 1 |
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