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Pharmacopeial Impurities (EP / USP / BP)

Norethindrone EP Impurity A

Reference StandardAvailable on request

Order Norethindrone EP Impurity A (CAS 31528-46-8) online at Zemixal: C20H24O2, COA and SDS with every lot, worldwide shipping.

Pack sizes
Norethindrone EP Impurity A chemical structure
CAS number31528-46-8
FormulaC20H24O2
Molar mass296.4 g/mol
Physical formSolid
HS code38229090
InChIKeySWNFRSGMYREPFG-XGXHKTLJSA-N
IUPAC name(8R,9S,10R,13S,14S,17R)-17-ethynyl-17-hydroxy-13-methyl-1,2,8,9,10,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one

About Norethindrone EP Impurity A

Norethindrone EP Impurity A belongs to the Norethindrone reference-standard family in the Zemixal catalogue. For your records (Reference Standard), the material is defined by CAS 31528-46-8, formula C20H24O2 and molar mass 296.4 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 (H302 and H334), so wear gloves and eye protection and work with good ventilation.

Order it in 10 mg, 25 mg, 50 mg and 100 mg packs or ask for a bulk quotation. Each lot travels with a certificate of analysis with characterisation data. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Norethindrone

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

Norethindrone 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 Norethindrone EP Impurity A
Product nameNorethindrone EP Impurity A
Catalogue numberZX-022311
CAS number31528-46-8
IUPAC name(8R,9S,10R,13S,14S,17R)-17-ethynyl-17-hydroxy-13-methyl-1,2,8,9,10,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one
Molecular formulaC20H24O2
Molar mass296.4 g/mol
Exact mass296.1776
GradeReference Standard
Physical formSolid
XLogP32.5
H-bond donors / acceptors1 / 2
Topological polar surface area37.3 Ų
HS code38229090
InChIKeySWNFRSGMYREPFG-XGXHKTLJSA-N
SMILESC[C@]12CC[C@@H]3[C@H]4CCC(=O)C=C4C=C[C@H]3[C@@H]1CC[C@]2(C#C)O
PubChem CID22216246
SynonymsNorethindrone Acetate EP Impurity A, Norethindrone EP Impurity A, 6,7-Dehydro Norethindrone, Norethisterone - Impurity A, 6,7-Dehydro Norethindrone, 6,7-Dehydronorethindrone, 6,7-Didehydronorethisterone, 17-Hydroxy-19-nor-17alpha-pregna-4,6-dien-20-yn-3-one (6,7-Didehydronorethisterone), 17alpha-Ethynyl-17beta-hydroxyestra-4,6-dien-3-one, (17alpha)-17-hydroxy-19-norpregna-4,6-dien-20-yn-3-one, 17-Hydroxy-19-nor-17a-pregna-4,6-dien-20-yn-3-one, 17-Hydroxy-17alpha-19-norpregna-4,6-dien-20-yn-3-one, 17-Hydroxy-19-nor-17alpha-pregna-4,6-dien-20-yn-3-one

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

Safety and GHS hazards

GHS07 Irritant or harmful
Irritant or harmful
GHS08 Health hazard
Health hazard

Signal word Danger

  • H302Harmful if swallowed
  • H334May cause allergy or asthma symptoms or breathing difficulties if inhaled

Precautionary statements P233, P260, P264, P270, P271, P284, P301 + P317, P304 + P340, P330, P342 + P316, P403, 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 Norethindrone 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 Norethindrone EP Impurity A

Which CAS number identifies Norethindrone EP Impurity A?
Norethindrone EP Impurity A is registered under CAS 31528-46-8. You may also see it listed as Norethindrone Acetate EP Impurity A, Norethindrone EP Impurity A, 6,7-Dehydro Norethindrone, Norethisterone - Impurity A. Our catalogue number for this item is ZX-022311.
What are the formula and molar mass of Norethindrone EP Impurity A?
For Norethindrone EP Impurity A, its formula is C20H24O2 and its molar mass is 296.4 g/mol. The systematic (IUPAC) name is (8R,9S,10R,13S,14S,17R)-17-ethynyl-17-hydroxy-13-methyl-1,2,8,9,10,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one. InChIKey SWNFRSGMYREPFG-XGXHKTLJSA-N lets you match it in any structure database.
How is Norethindrone EP Impurity A used in pharmaceutical QC?
Norethindrone EP Impurity A is a characterised reference material linked to Norethindrone. 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 Norethindrone 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 Norethindrone 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 Norethindrone EP Impurity A to my country?
Yes. Because Norethindrone 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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