Shipping to 128 countriesCOA and SDS with every lotQuotes within one business day
contact@zemixal.com
Bulk CASAccount
API Impurities

16-Keto 17-β-Estradiol

Reference StandardAvailable on request

Order 16-Keto 17-β-Estradiol (CAS 566-75-6) online at Zemixal. Request a quote with price, lead time and documents. Packs from 10 mg.

Pack sizes
16-Keto 17-β-Estradiol chemical structure
CAS number566-75-6
FormulaC18H22O3
Molar mass286.4 g/mol
Physical formSolid
HS code38229090
InChIKeyKJDGFQJCHFJTRH-YONAWACDSA-N
IUPAC name(8R,9S,13S,14S,17R)-3,17-dihydroxy-13-methyl-7,8,9,11,12,14,15,17-octahydro-6H-cyclopenta[a]phenanthren-16-one

About 16-Keto 17-β-Estradiol

16-Keto 17-β-Estradiol belongs to the Estradiol reference-standard family in the Zemixal catalogue. Identity at a glance (Reference Standard): CAS 566-75-6, formula C18H22O3 and molar mass 286.4 g/mol. It is handled as a solid.

Use cases we see most often

  • Analytical method development
  • Method validation (AMV)
  • QC release testing
  • ANDA / DMF filings

Safe handling

Hazard communication follows GHS (Warning: H361). 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 Estradiol

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

Estradiol standards

Typical uses

  • Analytical method development
  • Method validation (AMV)
  • QC release testing
  • ANDA / DMF filings

Applications

Pharmaceutical Manufacturing and QCResearch Labs and Universities

Specifications and identifiers

Specifications of 16-Keto 17-β-Estradiol
Product name16-Keto 17-β-Estradiol
Catalogue numberZX-024608
CAS number566-75-6
IUPAC name(8R,9S,13S,14S,17R)-3,17-dihydroxy-13-methyl-7,8,9,11,12,14,15,17-octahydro-6H-cyclopenta[a]phenanthren-16-one
Molecular formulaC18H22O3
Molar mass286.4 g/mol
Exact mass286.1569
GradeReference Standard
Physical formSolid
XLogP32.9
H-bond donors / acceptors2 / 3
Topological polar surface area57.5 Ų
HS code38229090
InChIKeyKJDGFQJCHFJTRH-YONAWACDSA-N
SMILESC[C@]12CC[C@H]3[C@H]([C@@H]1CC(=O)[C@@H]2O)CCC4=C3C=CC(=C4)O
PubChem CID66417
Synonyms16-Ketoestradiol, 16-Keto 17beta-Estradiol, 16-Oxoestradiol, Estra-1,3,5(10)-trien-16-one, 3,17-dihydroxy-, (17beta)-, (17beta)-3,17-dihydroxyestra-1,3,5(10)-trien-16-one, estra-1,3,5(10)-triene-3 beta-,17 beta-diol-16-one, Estra-1,3,5(10)-trien-16-one, 3,17-dihydroxy-, (17.beta.)-, 16-Oxo-17beta-estradiol, 1,3,5(10)-Estratrien-3,17-beta-diol-16-one, 16-keto-estriol

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 Warning

  • H361Suspected of damaging fertility or the unborn child

Precautionary statements P203, 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 16-Keto 17-β-Estradiol
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 16-Keto 17-β-Estradiol

Which CAS number identifies 16-Keto 17-β-Estradiol?
16-Keto 17-β-Estradiol is registered under CAS 566-75-6. You may also see it listed as 16-Ketoestradiol, 16-Keto 17beta-Estradiol, 16-Oxoestradiol. Our catalogue number for this item is ZX-024608.
What are the formula and molar mass of 16-Keto 17-β-Estradiol?
For 16-Keto 17-β-Estradiol, its formula is C18H22O3 and its molar mass is 286.4 g/mol. The systematic (IUPAC) name is (8R,9S,13S,14S,17R)-3,17-dihydroxy-13-methyl-7,8,9,11,12,14,15,17-octahydro-6H-cyclopenta[a]phenanthren-16-one. InChIKey KJDGFQJCHFJTRH-YONAWACDSA-N lets you match it in any structure database.
How is 16-Keto 17-β-Estradiol used in pharmaceutical QC?
16-Keto 17-β-Estradiol 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 16-Keto 17-β-Estradiol?
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 16-Keto 17-β-Estradiol?
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 16-Keto 17-β-Estradiol to my country?
Yes. Because 16-Keto 17-β-Estradiol 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.

More Estradiol standards

More in API Impurities

Have a list of compounds to price?

Paste up to 200 CAS numbers into Bulk CAS lookup, or send one enquiry for everything in your quote list. We reply with price, lead time and documents.

Bulk CAS lookup Open quote list
Compare 0 of 4Compare now