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Pharmacopeial Impurities (EP / USP / BP)

Ethinylestradiol EP Impurity B

Reference StandardAvailable on request

Buy Ethinylestradiol EP Impurity B (CAS 1231-96-5) from Zemixal. Request a quote with price, lead time and documents. Quotes within one business day.

Pack sizes
Ethinylestradiol EP Impurity B chemical structure
CAS number1231-96-5
FormulaC20H22O2
Molar mass294.4 g/mol
Physical formSolid
HS code38229090
InChIKeyDUZHXWCAIBMQPI-FYQPLNBISA-N
IUPAC name(8S,13S,14S,17R)-17-ethynyl-13-methyl-7,8,12,14,15,16-hexahydro-6H-cyclopenta[a]phenanthrene-3,17-diol

About Ethinylestradiol EP Impurity B

Zemixal lists Ethinylestradiol EP Impurity B for laboratories that identify, quantify or control Estradiol and its related substances. Identity at a glance (Reference Standard): CAS 1231-96-5, formula C20H22O2 and molar mass 294.4 g/mol. It is handled as a solid.

Common uses in the lab and plant

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

Safe handling

Hazard communication follows GHS (Danger: H302, H350, H372 and H400). Our SDS lists exposure controls and first-aid measures.

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. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Estradiol

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

Estradiol 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 B
Product nameEthinylestradiol EP Impurity B
Catalogue numberZX-021603
CAS number1231-96-5
IUPAC name(8S,13S,14S,17R)-17-ethynyl-13-methyl-7,8,12,14,15,16-hexahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Molecular formulaC20H22O2
Molar mass294.4 g/mol
Exact mass294.162
GradeReference Standard
Physical formSolid
XLogP33.3
H-bond donors / acceptors2 / 2
Topological polar surface area40.5 Ų
HS code38229090
InChIKeyDUZHXWCAIBMQPI-FYQPLNBISA-N
SMILESC[C@]12CC=C3[C@H]([C@@H]1CC[C@]2(C#C)O)CCC4=C3C=CC(=C4)O
PubChem CID11150565
Synonyms9,11-Dehydro Ethynyl Estradiol, Ethinylestradiol - Impurity B, Ethynylestradiol EP Impurity B, 9,11-Dehydro ethynylestradiol, 19-Nor-17alpha-pregna-1,3,5(10),9(11)-tetraen-20-yne-3,17-diol, 19-Norpregna-1,3,5(10),9(11)-tetraen-20-yne-3,17-diol, (17alpha)-, Ethinylestradiol impurity B, Ethinylestradiol specified impurity B, delta9,11- Ethinyl estradiol, 9,11-DehydroEthynylEstradiol, delta-9(11)-Ethynylestradiol

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
  • H372Causes damage to organs through prolonged or repeated exposure
  • H400Very toxic to aquatic life
  • 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 Ethinylestradiol EP Impurity B
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 B

Which CAS number identifies Ethinylestradiol EP Impurity B?
Ethinylestradiol EP Impurity B is registered under CAS 1231-96-5. You may also see it listed as 9,11-Dehydro Ethynyl Estradiol, Ethinylestradiol - Impurity B, Ethynylestradiol EP Impurity B. Our catalogue number for this item is ZX-021603.
What are the formula and molar mass of Ethinylestradiol EP Impurity B?
For Ethinylestradiol EP Impurity B, its formula is C20H22O2 and its molar mass is 294.4 g/mol. The systematic (IUPAC) name is (8S,13S,14S,17R)-17-ethynyl-13-methyl-7,8,12,14,15,16-hexahydro-6H-cyclopenta[a]phenanthrene-3,17-diol. InChIKey DUZHXWCAIBMQPI-FYQPLNBISA-N lets you match it in any structure database.
How is Ethinylestradiol EP Impurity B used in pharmaceutical QC?
Ethinylestradiol EP Impurity B is a characterised reference material linked to Estradiol. 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 B?
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 B?
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 B to my country?
Yes. Because Ethinylestradiol EP Impurity B 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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