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Pharmacopeial Impurities (EP / USP / BP)Reference StandardAvailable on request

Spironolactone EP Impurity C

Synonyms: Spironolactone - Impurity C · 6,7-Dihydrocanrenone · (2R)-3,4-Dihydro-5H-spiro(androst-4-ene-17,2-furan)-3,5-dione · Pregn-4-ene-21-carboxylic acid, 17-hydroxy-3-oxo-, gamma-lactone, (17alpha)-

CAS No.976-70-5
FormulaC22H30O3
Mol. weight342.50
Catalogue No.VQ-028115
PurityReference Standard
HSN38229090

Spironolactone EP Impurity C (CAS 976-70-5) – Spironolactone impurity standard. C22H30O3, MW 342.5. Request a quote: COA, bulk packs and worldwide export.

Pack sizesPrice on quotation · bulk available
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25 mg
50 mg
100 mg
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16-section GHS SDS
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About Spironolactone EP Impurity C

Spironolactone EP Impurity C is a pharmacopeial impurity of Spironolactone carrying the CAS registry number 976-70-5. Its molecular formula is C22H30O3 and its molecular weight is 342.5 g/mol. It is also known as Spironolactone - Impurity C or 6,7-Dihydrocanrenone.

The product is provided as a solid. Reference materials should be stored sealed and away from light and moisture, as specified on the accompanying COA. Handle it with standard laboratory precautions and appropriate personal protective equipment.

Pharmaceutical QC and development laboratories use this impurity standard of Spironolactone 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.

Vaqora Chemicals supplies Spironolactone EP Impurity C in 10 mg, 25 mg, 50 mg and 100 mg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

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

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Related to Spironolactone

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

Spironolactone impurities

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Specifications & identifiers

Chemical identifiers
Product nameSpironolactone EP Impurity C
Catalogue No.VQ-028115
CAS Number976-70-5
IUPAC name(8R,9S,10R,13S,14S,17R)-10,13-dimethylspiro[2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-17,5'-oxolane]-2',3-dione
Molecular formulaC22H30O3
Molecular weight342.5 g/mol
Exact mass342.2195
GradeReference Standard
HSN code38229090
InChIKeyUWBICEKKOYXZRG-WNHSNXHDSA-N
SMILESC[C@]12CCC(=O)C=C1CC[C@@H]3[C@@H]2CC[C@]4([C@H]3CC[C@@]45CCC(=O)O5)C
PubChem CID101931
Physical properties
Physical formSolid
LogP (XLogP3)3
H-bond donors / acceptors0 / 3
TPSA43.4 Ų
SynonymsSpironolactone - Impurity C, 6,7-Dihydrocanrenone, (2R)-3,4-Dihydro-5H-spiro(androst-4-ene-17,2-furan)-3,5-dione, Pregn-4-ene-21-carboxylic acid, 17-hydroxy-3-oxo-, gamma-lactone, (17alpha)-, 3-Oxopregn-4-ene-21,17alpha-carbolactone, 20-Spirox-4-ene-3,20-dione, spriolactone, Pregn-4-ene-21-carboxylic acid, 17-hydroxy-3-oxo-, .gamma.-lactone, (17.alpha.)-, 17-alpha-Pregn-4-ene-21-carboxylic acid, 17-hydroxy-3-oxo-, gamma-lactone, 3-(3-Oxo-17-beta-hydroxy-4-androsten-17-alpha-yl)propionic acid gamma-lactone, omega-(3-Oxo-17-beta-hydroxy-4-androsten-17-alpha-yl) propionic acid lactone, 17.alpha.-Pregn-4-ene-21-carboxylic acid, 17-hydroxy-3-oxo-, .gamma.-lactone

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Frequently asked questions

What is the CAS number of Spironolactone EP Impurity C?

The CAS Registry Number of Spironolactone EP Impurity C is 976-70-5. It is also known as Spironolactone - Impurity C, 6,7-Dihydrocanrenone, (2R)-3,4-Dihydro-5H-spiro(androst-4-ene-17,2-furan)-3,5-dione.

What is the molecular formula and molecular weight of Spironolactone EP Impurity C?

Spironolactone EP Impurity C has the molecular formula C22H30O3 and a molecular weight of 342.5 g/mol. Its IUPAC name is (8R,9S,10R,13S,14S,17R)-10,13-dimethylspiro[2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-17,5'-oxolane]-2',3-dione.

What is Spironolactone EP Impurity C used for?

Spironolactone EP Impurity C is supplied as a characterised reference material related to Spironolactone. 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 Spironolactone EP Impurity C can I order?

We supply Spironolactone EP Impurity C 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 Spironolactone EP Impurity C?

Yes. Every lot of Spironolactone EP Impurity C 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 Spironolactone EP Impurity C be shipped internationally?

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

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  • Custom synthesis & sourcing
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