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Pharmacopeial Impurities (EP / USP / BP)

Estriol EP Impurity K

Reference StandardAvailable on request

Buy Estriol EP Impurity K (CAS 901-93-9) from Zemixal. Request a quote with price, lead time and documents. Packs from 10 mg.

Pack sizes
Estriol EP Impurity K chemical structure
CAS number901-93-9
FormulaC20H24O3
Molar mass312.4 g/mol
Physical formSolid
HS code38229090
InChIKeyKDPQTPZDVJHMET-XSYGEPLQSA-N
IUPAC name[(8R,9S,13S,14S)-13-methyl-17-oxo-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-3-yl] acetate

About Estriol EP Impurity K

Analytical teams working on Estrone use Estriol EP Impurity K as a qualified comparison standard. Key data (Reference Standard): CAS 901-93-9, formula C20H24O3 and molar mass 312.4 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

Classified under GHS with signal word Danger and hazard statements H301, H311, H315 and H319. Read the SDS before first use.

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

Reference standards for Estrone

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

Estrone 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 K
Product nameEstriol EP Impurity K
Catalogue numberZX-024602
CAS number901-93-9
IUPAC name[(8R,9S,13S,14S)-13-methyl-17-oxo-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-3-yl] acetate
Molecular formulaC20H24O3
Molar mass312.4 g/mol
Exact mass312.1725
GradeReference Standard
Physical formSolid
XLogP33.2
H-bond donors / acceptors0 / 3
Topological polar surface area43.4 Ų
HS code38229090
InChIKeyKDPQTPZDVJHMET-XSYGEPLQSA-N
SMILESCC(=O)OC1=CC2=C(C=C1)[C@H]3CC[C@]4([C@H]([C@@H]3CC2)CCC4=O)C
PubChem CID92846
SynonymsEstrone Acetate, Estrone 3-Acetate, Estriol - Impurity K, Hogival, Acetoxyestrone, Puboestrene, Estra-1,3,5(10)-trien-17-one, 3-(acetyloxy)-, 3-acetoxy-17-oxo-1,3,5(10)-estratriene, Oestrone-3-acetate, 3-Acetoxyestrone, 3-Acetoxyestrone R, 17-oxoestra-1,3,5(10)-trien-3-yl acetate

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

Safety and GHS hazards

GHS06 Acute toxicity
Acute toxicity
GHS07 Irritant or harmful
Irritant or harmful
GHS08 Health hazard
Health hazard

Signal word Danger

  • H301Toxic if swallowed
  • H311Toxic in contact with skin
  • H315Causes skin irritation
  • H319Causes serious eye irritation
  • H331Toxic if inhaled
  • H335May cause respiratory irritation
  • H351Suspected of causing cancer
  • H360May damage fertility or the unborn child
  • H362May cause harm to breast-fed children

Precautionary statements P203, P260, P261, P262, P263, P264, P264 + P265, P270, P271, P280, P301 + P316, P302 + P352, P304 + P340, P305 + P351 + P338, P316, P318, P319, P321, P330, P332 + P317, P337 + P317, P361 + P364, P362 + P364, P403 + P233

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 K
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 K

Which CAS number identifies Estriol EP Impurity K?
Estriol EP Impurity K is registered under CAS 901-93-9. You may also see it listed as Estrone Acetate, Estrone 3-Acetate, Estriol - Impurity K. Our catalogue number for this item is ZX-024602.
What are the formula and molar mass of Estriol EP Impurity K?
For Estriol EP Impurity K, its formula is C20H24O3 and its molar mass is 312.4 g/mol. The systematic (IUPAC) name is [(8R,9S,13S,14S)-13-methyl-17-oxo-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-3-yl] acetate. InChIKey KDPQTPZDVJHMET-XSYGEPLQSA-N lets you match it in any structure database.
How is Estriol EP Impurity K used in pharmaceutical QC?
Estriol EP Impurity K is a characterised reference material linked to Estrone. 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 K?
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 K?
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 K to my country?
Yes. Because Estriol EP Impurity K 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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