Ethinylestradiol EP Impurity K

Name: Ethinylestradiol EP Impurity K
Brand: Vaqora Chemicals
SKU: VQ-022575

About Ethinylestradiol EP Impurity K

Ethinylestradiol EP Impurity K (CAS 155683-61-7) is a pharmacopeial impurity of Ethinylestradiol offered by Vaqora Chemicals. The compound has the formula C21H26O2, corresponding to a molecular weight of 310.4 g/mol. Alternative names: 4-Methyl Ethynyl Estradiol and Ethinylestradiol - Impurity K.

It is supplied as a solid. Store the standard in its sealed vial, protected from light and moisture, and follow the storage condition printed on the COA. Good laboratory practice and suitable PPE are recommended during handling.

Pharmaceutical QC and development laboratories use this impurity standard of Ethinylestradiol to develop and validate HPLC methods, to set specification limits and to document impurity profiles in ANDA and DMF submissions. It is used across pharmaceutical manufacturing and academic and industrial research.

We offer Ethinylestradiol EP Impurity K in 10 mg, 25 mg, 50 mg and 100 mg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

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

Industries

Related to Ethinylestradiol

View every impurity, metabolite and intermediate we list for Ethinylestradiol.

Ethinylestradiol impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Ethinylestradiol EP Impurity K
Catalogue No.	VQ-022575
CAS Number	155683-61-7
IUPAC name	(8R,9S,13S,14S,17R)-17-ethynyl-4,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Molecular formula	C₂₁H₂₆O₂
Molecular weight	310.4 g/mol
Exact mass	310.1933
Grade	Reference Standard
HSN code	38229090
InChIKey	GJUXDWYIPYRJJU-SACAXFFCSA-N
SMILES	CC1=C(C=CC2=C1CC[C@@H]3[C@@H]2CC[C@]4([C@H]3CC[C@]4(C#C)O)C)O
PubChem CID	71587537

Physical properties
Physical form	Solid
LogP (XLogP3)	4
H-bond donors / acceptors	2 / 2
TPSA	40.5 Å²
Synonyms	4-Methyl Ethynyl Estradiol, Ethinylestradiol - Impurity K, 4-Methyl-ethinylestradiol, 4-Methyl-ethinyl estradiol, 4-Methyl-19-nor-17alpha-pregna-1,3,5(10)-trien-20-yne-3,17-diol, 19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, 4-methyl-, (17alpha)-, Ethinylestradiol impurity K, Ethinylestradiol specified impurity K, Ethinyl Estradiol Impurity K, 8beta,9alpha,17alpha-4,9-Cyclo-9,10-secopregna-1(10),2,4-trien-20-yne-1,17-diol

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Ethinylestradiol EP Impurity K?

The CAS Registry Number of Ethinylestradiol EP Impurity K is 155683-61-7. It is also known as 4-Methyl Ethynyl Estradiol, Ethinylestradiol - Impurity K, 4-Methyl-ethinylestradiol.

What is the molecular formula and molecular weight of Ethinylestradiol EP Impurity K?

Ethinylestradiol EP Impurity K has the molecular formula C21H26O2 and a molecular weight of 310.4 g/mol. Its IUPAC name is (8R,9S,13S,14S,17R)-17-ethynyl-4,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol.

What is Ethinylestradiol EP Impurity K used for?

Ethinylestradiol EP Impurity K is supplied as a characterised reference material related to Ethinylestradiol. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Ethinylestradiol EP Impurity K can I order?

We supply Ethinylestradiol EP Impurity K in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Ethinylestradiol EP Impurity K?

Yes. Every lot of Ethinylestradiol EP Impurity K is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Ethinylestradiol EP Impurity K be shipped internationally?

Yes. We export Ethinylestradiol EP Impurity K worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.