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Impurities and reference standards

Ethinylestriol

Also known as 17-Ethynylestriol, Estriol, 17-ethynyl-, (16alpha,17alpha)-19-Norpregna-1,3,5(10)-trien-20-yne-3,16,17-triol

CAS 4717-40-2Formula C20H24O3Molar mass 312.41 g/mol
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Ethinylestriol chemical structure, C20H24O3, CAS 4717-40-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
4717-40-2
Formula
C20H24O3
Molar mass
312.41 g/mol
HS code
290729
Category
Impurities and reference standards

What is Ethinylestriol?

Plain description, key identifiers and synonyms

Ethinylestriol is a chemical substance with the molecular formula C20H24O3 and a molar mass of 312.41 g/mol. Its CAS registry number is 4717-40-2. The IUPAC name is (8R,9S,13S,14S,16R,17R)-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(8R,9S,13S,14S,16R,17R)-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol
CAS number
4717-40-2
Molecular formula
C20H24O3
UNII
PVH6K749AL
InChIKey
VSODIPLKPBLGCC-NADOGSGZSA-N
InChI
InChI=1S/C20H24O3/c1-3-20(23)18(22)11-17-16-6-4-12-10-13(21)5-7-14(12)15(16)8-9-19(17,20)2/h1,5,7,10,15-18,21-23H,4,6,8-9,11H2,2H3/t15-,16-,17+,18-,19+,20+/m1/s1
Canonical SMILES
C#CC1(O)C(O)CC2C3CCc4cc(O)ccc4C3CCC21C
Isomeric SMILES
C[C@]12CC[C@H]3[C@H]([C@@H]1C[C@H]([C@]2(C#C)O)O)CCC4=C3C=CC(=C4)O

Synonyms

  • 17-Ethynylestriol
  • Estriol, 17-ethynyl-
  • (16alpha,17alpha)-19-Norpregna-1,3,5(10)-trien-20-yne-3,16,17-triol
  • 19-Nor-17alpha-pregna-1,3,5(10)-trien-20-yne-3,16alpha,17-triol
  • (16alpha,17.alpha.)-19-norpregna-1,3,5(10)-trien-20-yne-3,16,17-triol
  • (8R,9S,13S,14S,16R,17R)-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol
  • 17-alpha-Ethynylestriol
  • Nilestriol Impurity 10
  • (8R,9S,13S,14S,16R,17R)-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol

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
312.41 g/molcalc.
Exact mass
312.1725 Dacalc.
LogP (octanol/water)
2.58calc.
Topological polar surface area
60.69 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
0calc.
Heavy atoms
23calc.
Rings
4calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.6calc.
Formal charge
0calc.
Stereocentres
6calc.
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, c1ccc2c(c1)CCC1C2CCC2CCCC21

c1ccc2c(c1)CCC1C2CCC2CCCC21

4 rings, 17 atoms.

585 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.

Ethinylestriol suppliers

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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

1 supplier in 1 country

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Ethinylestriol price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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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 Ethinylestriol is traded under.

HS 2907.29Indicative HS code

Polyphenols, phenol-alcohols, other

World exports in 2024
$535M
−27.0% vs 2023, imports $565M
2019 to 2024
Top exporters
  1. India * partner reported17.7%
  2. Germany16.5%
  3. Japan15.8%
Top importers
  1. United States13.1%
  2. Japan8.0%
  3. Belgium7.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Ethinylestriol?

Ethinylestriol is a chemical substance with the molecular formula C20H24O3 and a molar mass of 312.41 g/mol. Its CAS registry number is 4717-40-2. The IUPAC name is (8R,9S,13S,14S,16R,17R)-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol.

What is the CAS number of Ethinylestriol?

The CAS registry number of Ethinylestriol is 4717-40-2.

What is the molecular formula and weight of Ethinylestriol?

The molecular formula of Ethinylestriol is C20H24O3 and its molar mass is 312.41 g/mol.

Is Ethinylestriol hazardous?

No GHS hazard classification for Ethinylestriol 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 Ethinylestriol?

Ethinylestriol is usually classified under HS code 290729 (Polyphenols, phenol-alcohols, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Ethinylestriol?

CompoundList lists 1 supplier of Ethinylestriol in China. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Ethinylestriol?

Suppliers quote Ethinylestriol 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 Ethinylestriol

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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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