5-PREGNEN-3β, 11β, 17, 20β-TETROL CAS 19516-75-7

Purity 97%+In StockPharmaceutical Standards
CAS No.19516-75-7
Molecular FormulaC21H34O4
Molecular Weight350.49 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-PREGNEN-3β, 11β, 17, 20β-TETROL CAS 19516-75-7 chemical structure

Description

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

5-PREGNEN-3β, 11β, 17, 20β-TETROL (CAS 19516-75-7) is a high-purity analytical reference standard with the molecular formula C21H34O4 and a molecular weight of 350.49 g/mol.

5-PREGNEN-3β, 11β, 17, 20β-TETROL (C21H34O4) 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).

As a certified reference material (CRM), 5-PREGNEN-3β, 11β, 17, 20β-TETROL 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 FormulaC21H34O4
Molecular Weight350.49 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.)1962

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