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Pharmacopeial Impurities (EP / USP / BP)

Estriol EP Impurity A

Reference StandardAvailable on request

Estriol EP Impurity A (CAS 246021-20-5) supplier Zemixal. Lab and bulk packs, batch COA, fast global delivery. Packs from 10 mg.

Pack sizes
Estriol EP Impurity A chemical structure
CAS number246021-20-5
FormulaC18H22O3
Molar mass286.4 g/mol
Physical formSolid
HS code38229090
InChIKeyZWHFPHWLYUMTGY-WKULXVSPSA-N
IUPAC name(8S,13S,14S,16R,17R)-13-methyl-6,7,8,12,14,15,16,17-octahydrocyclopenta[a]phenanthrene-3,16,17-triol

About Estriol EP Impurity A

Analytical teams working on Estriol use Estriol EP Impurity A as a qualified comparison standard. For your records (Reference Standard), the material is defined by CAS 246021-20-5, formula C18H22O3 and molar mass 286.4 g/mol. It is handled as a solid.

Where it is used

  • 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. Each lot travels with 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 A
Product nameEstriol EP Impurity A
Catalogue numberZX-021596
CAS number246021-20-5
IUPAC name(8S,13S,14S,16R,17R)-13-methyl-6,7,8,12,14,15,16,17-octahydrocyclopenta[a]phenanthrene-3,16,17-triol
Molecular formulaC18H22O3
Molar mass286.4 g/mol
Exact mass286.1569
GradeReference Standard
Physical formSolid
XLogP32.4
H-bond donors / acceptors3 / 3
Topological polar surface area60.7 Ų
HS code38229090
InChIKeyZWHFPHWLYUMTGY-WKULXVSPSA-N
SMILESC[C@]12CC=C3[C@H]([C@@H]1C[C@H]([C@@H]2O)O)CCC4=C3C=CC(=C4)O
PubChem CID9925903
Synonyms9,11-Didehydrooestriol, Estriol Impurity A, Estriol - Impurity A, 9(11)-Didehydroestriol, Estra-1,3,5(10),9(11)-tetraene-3,16alpha,17beta-triol, Estra-1,3,5(10),9(11)-tetraene-3,16,17-triol, Estra-1,3,5(10),9(11)-tetraene-3,16,17-triol, (16alpha,17beta)-, Estra-1,3,5(10),9(11)-tetraene-3,16alpha,17beta-triol (9,11-Didehydroestriol)

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 Estriol EP Impurity A
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 A

Which CAS number identifies Estriol EP Impurity A?
Estriol EP Impurity A is registered under CAS 246021-20-5. You may also see it listed as 9,11-Didehydrooestriol, Estriol Impurity A, Estriol - Impurity A. Our catalogue number for this item is ZX-021596.
What are the formula and molar mass of Estriol EP Impurity A?
For Estriol EP Impurity A, its formula is C18H22O3 and its molar mass is 286.4 g/mol. The systematic (IUPAC) name is (8S,13S,14S,16R,17R)-13-methyl-6,7,8,12,14,15,16,17-octahydrocyclopenta[a]phenanthrene-3,16,17-triol. InChIKey ZWHFPHWLYUMTGY-WKULXVSPSA-N lets you match it in any structure database.
How is Estriol EP Impurity A used in pharmaceutical QC?
Estriol EP Impurity A 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 A?
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 A?
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 A to my country?
Yes. Estriol EP Impurity A ships worldwide by express courier, air cargo or sea freight, quoted on the Incoterm you prefer, with full export documents.

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