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API Process Intermediates & Related Compounds

Ethynylestradiol

Reference StandardIn stock

Buy Ethynylestradiol (CAS 57-63-6) from Zemixal. Lab and bulk packs, batch COA, fast global delivery. Quotes within one business day.

Pack sizes
Ethynylestradiol chemical structure
CAS number57-63-6
FormulaC20H24O2
Molar mass296.4 g/mol
Physical formSolid
InChIKeyBFPYWIDHMRZLRN-SLHNCBLASA-N
IUPAC name(8R,9S,13S,14S,17R)-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol

About Ethynylestradiol

Zemixal supplies Ethynylestradiol within its pharma Intermediates & Building Blocks portfolio. Identity at a glance (Reference Standard): CAS 57-63-6, formula C20H24O2 and molar mass 296.4 g/mol. It is handled as a solid.

Use cases we see most often

  • API route development
  • Impurity fate & purge studies
  • Analytical method development

Storage and safety notes

Classified under GHS with signal word Danger and hazard statements H302, H350, H360 and H372. Read the SDS before first use.

Standard pack sizes are 10 mg, 25 mg, 50 mg, 100 mg and 250 mg, and custom quantities are quoted on request. You receive a batch certificate of analysis and a 16-section SDS with each order. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Ethinylestradiol

See every impurity, metabolite and related compound we list for this API.

Ethinylestradiol standards

Typical uses

  • API route development
  • Impurity fate & purge studies
  • Analytical method development

Applications

Pharmaceutical Manufacturing and QCResearch Labs and Universities

Specifications and identifiers

Specifications of Ethynylestradiol
Product nameEthynylestradiol
Catalogue numberZX-012484
CAS number57-63-6
IUPAC name(8R,9S,13S,14S,17R)-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Molecular formulaC20H24O2
Molar mass296.4 g/mol
Exact mass296.1776
GradeReference Standard
Physical formSolid
XLogP33.7
H-bond donors / acceptors2 / 2
Topological polar surface area40.5 Ų
InChIKeyBFPYWIDHMRZLRN-SLHNCBLASA-N
SMILESC[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@]2(C#C)O)CCC4=C3C=CC(=C4)O
PubChem CID5991
Synonyms(17α)-19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, 7-Nor-17α-pregna-1,3,5-(10)-trien-20-yne-3,17-diol, 17α-Ethynylestra-1,3,5(10)-triene-3,17β-diol, 17α-Ethinyl-1,3,5(10)-estratriene-3,17-diol, 17α-Ethynylestradiol, Amenoron, Eticylol, Eticyclin, Etivex, Feminone, Gynolett, Kolpolyn

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

GHS07 Irritant or harmful
Irritant or harmful
GHS08 Health hazard
Health hazard
GHS09 Hazardous to the environment
Hazardous to the environment

Signal word Danger

  • H302Harmful if swallowed
  • H350May cause cancer
  • H360May damage fertility or the unborn child
  • H372Causes damage to organs through prolonged or repeated exposure
  • H410Very toxic to aquatic life with long lasting effects

Precautionary statements P203, P260, P264, P270, P273, P280, P301 + P317, P318, P319, P330, P391, P405, P501

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of Ethynylestradiol
10 mgQuoted on request
25 mgQuoted on request
50 mgQuoted on request
100 mgQuoted on request
250 mgQuoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about Ethynylestradiol

Which CAS number identifies Ethynylestradiol?
Ethynylestradiol is registered under CAS 57-63-6. You may also see it listed as (17α)-19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, 7-Nor-17α-pregna-1,3,5-(10)-trien-20-yne-3,17-diol, 17α-Ethynylestra-1,3,5(10)-triene-3,17β-diol. Our catalogue number for this item is ZX-012484.
What are the formula and molar mass of Ethynylestradiol?
For Ethynylestradiol, its formula is C20H24O2 and its molar mass is 296.4 g/mol. The systematic (IUPAC) name is (8R,9S,13S,14S,17R)-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol. InChIKey BFPYWIDHMRZLRN-SLHNCBLASA-N lets you match it in any structure database.
How is Ethynylestradiol used in pharmaceutical QC?
Ethynylestradiol is a characterised reference material linked to Ethinylestradiol. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.
What grade and pack sizes are available for Ethynylestradiol?
This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg, 250 mg. Larger quantities and custom packing can be quoted on request.
Which documents come with Ethynylestradiol?
Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.
Can Zemixal ship Ethynylestradiol to my country?
Yes. Because Ethynylestradiol is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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