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Pharmacopeial Impurities (EP / USP / BP)

Ethinylestradiol EP Impurity K

Reference StandardAvailable on request

Buy Ethinylestradiol EP Impurity K (CAS 155683-61-7) from Zemixal. Lab and bulk packs, batch COA, fast global delivery. Packs from 10 mg.

Pack sizes
Ethinylestradiol EP Impurity K chemical structure
CAS number155683-61-7
FormulaC21H26O2
Molar mass310.4 g/mol
Physical formSolid
HS code38229090
InChIKeyGJUXDWYIPYRJJU-SACAXFFCSA-N
IUPAC name(8R,9S,13S,14S,17R)-17-ethynyl-4,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol

About Ethinylestradiol EP Impurity K

Ethinylestradiol EP Impurity K belongs to the Ethinylestradiol reference-standard family in the Zemixal catalogue. Identity at a glance (Reference Standard): CAS 155683-61-7, formula C21H26O2 and molar mass 310.4 g/mol. It is handled as a solid.

Typical applications

  • Pharmacopeial method verification
  • Impurity profiling
  • QC release testing
  • ANDA / DMF filings

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. You receive a certificate of analysis with characterisation data with each order. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

Reference standards for Ethinylestradiol

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

Ethinylestradiol standards

Typical uses

  • Pharmacopeial method verification
  • Impurity profiling
  • QC release testing
  • ANDA / DMF filings

Applications

Pharmaceutical Manufacturing and QCResearch Labs and Universities

Grade guides

Ph. Eur. Grade (European Pharmacopoeia)

Specifications and identifiers

Specifications of Ethinylestradiol EP Impurity K
Product nameEthinylestradiol EP Impurity K
Catalogue numberZX-021604
CAS number155683-61-7
IUPAC name(8R,9S,13S,14S,17R)-17-ethynyl-4,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Molecular formulaC21H26O2
Molar mass310.4 g/mol
Exact mass310.1933
GradeReference Standard
Physical formSolid
XLogP34
H-bond donors / acceptors2 / 2
Topological polar surface area40.5 Ų
HS code38229090
InChIKeyGJUXDWYIPYRJJU-SACAXFFCSA-N
SMILESCC1=C(C=CC2=C1CC[C@@H]3[C@@H]2CC[C@]4([C@H]3CC[C@]4(C#C)O)C)O
PubChem CID71587537
Synonyms4-Methyl Ethynyl Estradiol, Ethinylestradiol - Impurity K, 4-Methyl-ethinylestradiol, 4-Methyl-ethinyl estradiol, 4-Methyl-19-nor-17alpha-pregna-1,3,5(10)-trien-20-yne-3,17-diol, 19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, 4-methyl-, (17alpha)-, Ethinylestradiol impurity K, Ethinylestradiol specified impurity K, Ethinyl Estradiol Impurity K, 8beta,9alpha,17alpha-4,9-Cyclo-9,10-secopregna-1(10),2,4-trien-20-yne-1,17-diol

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

Safety and GHS hazards

No GHS classification is on file for this item. Handle it as an unknown laboratory chemical and request the SDS with your quotation.

Pack sizes

Pack sizes of Ethinylestradiol EP Impurity K
10 mgQuoted on request
25 mgQuoted on request
50 mgQuoted on request
100 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 Ethinylestradiol EP Impurity K

Which CAS number identifies Ethinylestradiol EP Impurity K?
Ethinylestradiol EP Impurity K is registered under CAS 155683-61-7. You may also see it listed as 4-Methyl Ethynyl Estradiol, Ethinylestradiol - Impurity K, 4-Methyl-ethinylestradiol. Our catalogue number for this item is ZX-021604.
What are the formula and molar mass of Ethinylestradiol EP Impurity K?
For Ethinylestradiol EP Impurity K, its formula is C21H26O2 and its molar mass is 310.4 g/mol. The systematic (IUPAC) name is (8R,9S,13S,14S,17R)-17-ethynyl-4,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol. InChIKey GJUXDWYIPYRJJU-SACAXFFCSA-N lets you match it in any structure database.
How is Ethinylestradiol EP Impurity K used in pharmaceutical QC?
Ethinylestradiol EP Impurity K 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 Ethinylestradiol EP Impurity K?
This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.
Which documents come with Ethinylestradiol EP Impurity K?
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 Ethinylestradiol EP Impurity K to my country?
Yes. Ethinylestradiol EP Impurity K ships worldwide by express courier, air cargo or sea freight, quoted on the Incoterm you prefer, with full export documents.

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