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Pharmacopeial Impurities (EP / USP / BP)

Estriol EP Impurity E

Reference StandardAvailable on request

Buy Estriol EP Impurity E (CAS 1228-72-4) from Zemixal: C18H24O3, COA and SDS with every lot, worldwide shipping. Catalogue no. ZX-021595.

Pack sizes
Estriol EP Impurity E chemical structure
CAS number1228-72-4
FormulaC18H24O3
Molar mass288.4 g/mol
Physical formSolid
HS code38229090
InChIKeyPROQIPRRNZUXQM-PNVOZDDCSA-N
IUPAC name(8R,9S,13S,14S,16R,17S)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,16,17-triol

About Estriol EP Impurity E

Estriol EP Impurity E belongs to the Estriol reference-standard family in the Zemixal catalogue. For your records (Reference Standard), the material is defined by CAS 1228-72-4, formula C18H24O3 and molar mass 288.4 g/mol. It is handled as a solid.

Typical applications

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

Safe handling

Hazard communication follows GHS (Danger: H350, H360 and H372). 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. Every shipment includes a certificate of analysis with characterisation data. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

Reference standards for Estriol

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

Estriol 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 Estriol EP Impurity E
Product nameEstriol EP Impurity E
Catalogue numberZX-021595
CAS number1228-72-4
IUPAC name(8R,9S,13S,14S,16R,17S)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,16,17-triol
Molecular formulaC18H24O3
Molar mass288.4 g/mol
Exact mass288.1725
GradeReference Standard
Physical formSolid
XLogP32.5
H-bond donors / acceptors3 / 3
Topological polar surface area60.7 Ų
HS code38229090
InChIKeyPROQIPRRNZUXQM-PNVOZDDCSA-N
SMILESC[C@]12CC[C@H]3[C@H]([C@@H]1C[C@H]([C@H]2O)O)CCC4=C3C=CC(=C4)O
PubChem CID256737
Synonyms17-Epiestriol, Estriol - Impurity E, 17alpha-Estriol, 16alpha-Hydroxy-17alpha-estradiol, 1,3,5(10)-Estratriene-3,16alpha,17alpha-triol, estra-1(10),2,4-triene-3,16alpha,17alpha-triol, 3,16alpha,17alpha-Trihydroxy-1,3,5(10)-estratriene, (16alpha,17alpha)-estra-1(10),2,4-triene-3,16,17-triol, Estra-1,3,5(10)-triene-3,16,17-triol, (16alpha,17alpha)-, 16a,17a-Estriol, (16alpha,17alpha)-Estra-1,3,5(10)-Triene-3,16,17-Triol, 16a-Hydroxy-17a-estradiol

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

Safety and GHS hazards

GHS08 Health hazard
Health hazard

Signal word Danger

  • H350May cause cancer
  • H360May damage fertility or the unborn child
  • H372Causes damage to organs through prolonged or repeated exposure

Precautionary statements P203, P260, P264, P270, P280, P318, P319, 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 Estriol EP Impurity E
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 Estriol EP Impurity E

Which CAS number identifies Estriol EP Impurity E?
Estriol EP Impurity E is registered under CAS 1228-72-4. You may also see it listed as 17-Epiestriol, Estriol - Impurity E, 17alpha-Estriol. Our catalogue number for this item is ZX-021595.
What are the formula and molar mass of Estriol EP Impurity E?
For Estriol EP Impurity E, its formula is C18H24O3 and its molar mass is 288.4 g/mol. The systematic (IUPAC) name is (8R,9S,13S,14S,16R,17S)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,16,17-triol. InChIKey PROQIPRRNZUXQM-PNVOZDDCSA-N lets you match it in any structure database.
How is Estriol EP Impurity E used in pharmaceutical QC?
Estriol EP Impurity E is a characterised reference material linked to Estriol. 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 Estriol EP Impurity E?
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 Estriol EP Impurity E?
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 Estriol EP Impurity E to my country?
Yes. Because Estriol EP Impurity E 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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