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Pharmacopeial Impurities (EP / USP / BP)

Estradiol Hemihydrate EP Impurity A

Reference StandardAvailable on request

Buy Estradiol Hemihydrate EP Impurity A (CAS 19973-76-3) from Zemixal. Lab and bulk packs, batch COA, fast global delivery.

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Estradiol Hemihydrate EP Impurity A chemical structure
CAS number19973-76-3
FormulaC18H22O2
Molar mass270.4 g/mol
Physical formSolid
HS code38229090
InChIKeyDNXHEGUUPJUMQT-CBZIJGRNSA-N
IUPAC name(8R,9S,13S,14S)-3-hydroxy-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-one

About Estradiol Hemihydrate EP Impurity A

Analytical teams working on Estradiol use Estradiol Hemihydrate EP Impurity A as a qualified comparison standard. Identity at a glance (Reference Standard): CAS 19973-76-3, formula C18H22O2 and molar mass 270.4 g/mol. It is handled as a solid.

Use cases we see most often

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

Safe handling

It carries the GHS signal word Danger (H350, H351, H360 and H362), so wear gloves and eye protection and work with good ventilation.

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. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

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 A
Product nameEstradiol Hemihydrate EP Impurity A
Catalogue numberZX-045395
CAS number19973-76-3
IUPAC name(8R,9S,13S,14S)-3-hydroxy-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-one
Molecular formulaC18H22O2
Molar mass270.4 g/mol
Exact mass270.162
GradeReference Standard
Physical formSolid
XLogP33.1
H-bond donors / acceptors1 / 2
Topological polar surface area37.3 Ų
HS code38229090
InChIKeyDNXHEGUUPJUMQT-CBZIJGRNSA-N
SMILESC[C@]12CC[C@H]3[C@H]([C@@H]1CCC2=O)CCC4=C3C=CC(=C4)O
PubChem CID5870
Synonyms(±)-Estrone, estrone, folliculin, Theelin, estrovarin, Thelykinin, Kestrone, Ketohydroxyestrin, Estrugenone, Tokokin, Glandubolin, Hiestrone

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
  • H362May cause harm to breast-fed children

Precautionary statements P203, P260, P263, P264, P270, P280, P318, 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 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 Estradiol Hemihydrate EP Impurity A

Which CAS number identifies Estradiol Hemihydrate EP Impurity A?
Estradiol Hemihydrate EP Impurity A is registered under CAS 19973-76-3. You may also see it listed as (±)-Estrone, estrone, folliculin. Our catalogue number for this item is ZX-045395.
What are the formula and molar mass of Estradiol Hemihydrate EP Impurity A?
For Estradiol Hemihydrate EP Impurity A, its formula is C18H22O2 and its molar mass is 270.4 g/mol. The systematic (IUPAC) name is (8R,9S,13S,14S)-3-hydroxy-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-one. InChIKey DNXHEGUUPJUMQT-CBZIJGRNSA-N lets you match it in any structure database.
How is Estradiol Hemihydrate EP Impurity A used in pharmaceutical QC?
Estradiol Hemihydrate EP Impurity A 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 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 Estradiol Hemihydrate 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 Estradiol Hemihydrate EP Impurity A to my country?
Yes. Because Estradiol Hemihydrate EP Impurity A 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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