5α-PREGNAN-17-OL-3, 20-DIONE CAS 570-59-2

Purity 97%+In StockPharmaceutical Standards
CAS No.570-59-2
Molecular FormulaC21H32O3
Molecular Weight332.48 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5α-PREGNAN-17-OL-3, 20-DIONE CAS 570-59-2 chemical structure

Description

5α-PREGNAN-17-OL-3, 20-DIONE (CAS 570-59-2), molecular formula C21H32O3 and molecular weight 332.48 g/mol, is a CATO reference standard with documented purity and traceability.

5α-PREGNAN-17-OL-3, 20-DIONE (C21H32O3) contains a steroid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaC21H32O3
Molecular Weight332.48 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957

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