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Steroids and sterols

Ethynerone

Also known as Etinerona, Ethyneronum, 17-alpha-Chloroethynyl-19-nor-4,9-androstadien-17-beta-ol-3-one

CAS 3124-93-4Formula C20H23ClO2Molar mass 330.86 g/mol
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Ethynerone chemical structure, C20H23ClO2, CAS 3124-93-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3124-93-4
Formula
C20H23ClO2
Molar mass
330.86 g/mol
HS code
291479
Category
Steroids and sterols

What is Ethynerone?

Plain description, key identifiers and synonyms

Ethynerone is a chemical substance with the molecular formula C20H23ClO2 and a molar mass of 330.86 g/mol. Its CAS registry number is 3124-93-4. The IUPAC name is (8S,13S,14S,17S)-17-(2-chloroethynyl)-17-hydroxy-13-methyl-1,2,6,7,8,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(8S,13S,14S,17S)-17-(2-chloroethynyl)-17-hydroxy-13-methyl-1,2,6,7,8,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one
CAS number
3124-93-4 CAS number cross-checked
Molecular formula
C20H23ClO2
UNII
CKM4S0R7LX
InChIKey
KEOBKPHJNAILCW-FUMNGEBKSA-N
InChI
InChI=1S/C20H23ClO2/c1-19-8-6-16-15-5-3-14(22)12-13(15)2-4-17(16)18(19)7-9-20(19,23)10-11-21/h12,17-18,23H,2-9H2,1H3/t17-,18+,19+,20-/m1/s1
Canonical SMILES
CC12CCC3=C4CCC(=O)C=C4CCC3C1CCC2(O)C#CCl
Isomeric SMILES
C[C@]12CCC3=C4CCC(=O)C=C4CC[C@H]3[C@@H]1CC[C@]2(C#CCl)O

Synonyms

  • Etinerona
  • Ethyneronum
  • 17-alpha-Chloroethynyl-19-nor-4,9-androstadien-17-beta-ol-3-one
  • 19-Nor-17-alpha-pregna-4,9-dien-20-yn-3-one, 21-chloro-17-hydroxy-
  • 21-chloro-17-hydroxy-19-nor-17 alpha-pregna-4,9-dien-20-yn-3-one
  • 21-Chloro-17-hydroxy-19-nor-17alpha-pregna-4,9-dien-20-yn-3-one
  • MK 665
  • Ethynerone (USAN/INN)
  • (8S,13S,14S,17S)-17-(2-chloroethynyl)-17-hydroxy-13-methyl-1,2,6,7,8,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one
  • 17-alpha-Chloroethinyl-17-beta-hydroxyestra-4,9-dien-3-one
  • 17-alpha-Chloroethynyl-17-beta-hydroxy-19-nor-4,9-androstadien-3-one
  • 19-Norpregna-4,9-dien-20-yn-3-one, 21-chloro-17-hydroxy-, (17alpha)-
  • 21-Chloro-17-hydroxy-17alpha-19-norpregna-4,9-dien-20-yn-3-one

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
330.86 g/molcalc.
Exact mass
330.1387 Dacalc.
LogP (octanol/water)
4.12calc.
Topological polar surface area
37.3 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
23calc.
Rings
4calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.65calc.
Formal charge
0calc.
Stereocentres
4calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C1C=C2CCC3C(=C2CC1)CCC1CCCC13

O=C1C=C2CCC3C(=C2CC1)CCC1CCCC13

4 rings, 18 atoms.

30 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Ethynerone suppliers

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Ethynerone price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Ethynerone is traded under.

HS 2914.79Indicative HS code

Halogenated, sulphonated, nitrated or nitrosated derivatives, other

World exports in 2024
$558M
−12.1% vs 2023, imports $608M
2019 to 2024
Top exporters
  1. China41.2%
  2. India * partner reported28.7%
  3. Germany16.7%
Top importers
  1. United States29.1%
  2. Italy9.9%
  3. Switzerland * partner reported8.8%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Ethynerone is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Ethynerone, based on the data on this page

What is Ethynerone?

Ethynerone is a chemical substance with the molecular formula C20H23ClO2 and a molar mass of 330.86 g/mol. Its CAS registry number is 3124-93-4. The IUPAC name is (8S,13S,14S,17S)-17-(2-chloroethynyl)-17-hydroxy-13-methyl-1,2,6,7,8,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one.

What is the CAS number of Ethynerone?

The CAS registry number of Ethynerone is 3124-93-4.

What is the molecular formula and weight of Ethynerone?

The molecular formula of Ethynerone is C20H23ClO2 and its molar mass is 330.86 g/mol.

Is Ethynerone hazardous?

No GHS hazard classification for Ethynerone is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Ethynerone?

Ethynerone is usually classified under HS code 291479 (Halogenated, sulphonated, nitrated or nitrosated derivatives, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Ethynerone?

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What is the price of Ethynerone?

Suppliers quote Ethynerone on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Ethynerone

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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