5a-Pregnan-3b,17a-diol-20-one CAS 570-54-7

Purity 97%+In StockPharmaceutical Standards
CAS No.570-54-7
Molecular FormulaC21H34O3
Molecular Weight334.49 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5a-Pregnan-3b,17a-diol-20-one CAS 570-54-7 chemical structure

Description

CATO supplies 5a-Pregnan-3b,17a-diol-20-one (CAS 570-54-7), a certified reference material (molecular formula C21H34O3, MW 334.49 g/mol) for analytical method development and quality control.

The molecular framework of 5a-Pregnan-3b,17a-diol-20-one (C21H34O3) is characterized by a steroid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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

As a certified reference material (CRM), 5a-Pregnan-3b,17a-diol-20-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC21H34O3
Molecular Weight334.49 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at room temperature, keep sealed and dry
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)5.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957

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