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Pharmacopeial Impurities (EP / USP / BP)

Estradiol hemihydrate EP Impurity B

Reference StandardAvailable on request

Estradiol hemihydrate EP Impurity B (CAS 57-91-0) supplier Zemixal: C18H24O2, COA and SDS with every lot, worldwide shipping.

Pack sizes
Estradiol hemihydrate EP Impurity B chemical structure
CAS number57-91-0
FormulaC18H24O2
Molar mass272.4 g/mol
Physical formSolid
HS code38229090
InChIKeyVOXZDWNPVJITMN-SFFUCWETSA-N
IUPAC name(8R,9S,13S,14S,17R)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,17-diol

About Estradiol hemihydrate EP Impurity B

Estradiol hemihydrate EP Impurity B belongs to the Estradiol reference-standard family in the Zemixal catalogue. Key data (Reference Standard): CAS 57-91-0, formula C18H24O2 and molar mass 272.4 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

Handling and storage

Hazard communication follows GHS (Danger: H350, H351, H360 and H361). Our SDS lists exposure controls and first-aid measures.

Available as 10 mg, 25 mg, 50 mg and 100 mg. Larger or split packs can be arranged. Every shipment includes a certificate of analysis with characterisation data. 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 Estradiol hemihydrate EP Impurity B
Product nameEstradiol hemihydrate EP Impurity B
Catalogue numberZX-021605
CAS number57-91-0
IUPAC name(8R,9S,13S,14S,17R)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,17-diol
Molecular formulaC18H24O2
Molar mass272.4 g/mol
Exact mass272.1776
GradeReference Standard
Physical formSolid
XLogP34
H-bond donors / acceptors2 / 2
Topological polar surface area40.5 Ų
HS code38229090
InChIKeyVOXZDWNPVJITMN-SFFUCWETSA-N
SMILESC[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@H]2O)CCC4=C3C=CC(=C4)O
PubChem CID68570
Synonyms17-Alpha-Estradiol, Ethinylestradiol - Impurity L, 17α-Estradiol, Estriol EP Impurity J, Ethinylestradiol EP Impurity L, Estradiol Hemihydrate - Impurity B, Estriol - Impurity J, 17alpha-Estradiol, alpha-Estradiol, 17a-estradiol, Estradiol-17alpha

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
  • H351Suspected of causing cancer
  • H360May damage fertility or the unborn child
  • H361Suspected of damaging fertility or the unborn child
  • H362May cause harm to breast-fed children
  • H372Causes damage to organs through prolonged or repeated exposure

Precautionary statements P203, P260, P263, 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 Estradiol hemihydrate 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 Estradiol hemihydrate EP Impurity B

Which CAS number identifies Estradiol hemihydrate EP Impurity B?
Estradiol hemihydrate EP Impurity B is registered under CAS 57-91-0. You may also see it listed as 17-Alpha-Estradiol, Ethinylestradiol - Impurity L, 17α-Estradiol. Our catalogue number for this item is ZX-021605.
What are the formula and molar mass of Estradiol hemihydrate EP Impurity B?
For Estradiol hemihydrate EP Impurity B, its formula is C18H24O2 and its molar mass is 272.4 g/mol. The systematic (IUPAC) name is (8R,9S,13S,14S,17R)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,17-diol. InChIKey VOXZDWNPVJITMN-SFFUCWETSA-N lets you match it in any structure database.
How is Estradiol hemihydrate EP Impurity B used in pharmaceutical QC?
Estradiol hemihydrate 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 Estradiol hemihydrate 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 Estradiol hemihydrate 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 Estradiol hemihydrate EP Impurity B to my country?
Yes. Because Estradiol hemihydrate 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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