1, 4-PREGNADIEN-9α, 11β-DICHLORO-17, 21-DIOL-3, 20-DIONE 21-ACETATE CAS 79-61-8

Purity 97%+In StockPharmaceutical Standards
CAS No.79-61-8
Molecular FormulaC23H28Cl2O5
Molecular Weight455.37 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

1, 4-PREGNADIEN-9α, 11β-DICHLORO-17, 21-DIOL-3, 20-DIONE 21-ACETATE CAS 79-61-8 chemical structure

Description

The occurrence of 1, 4-PREGNADIEN-9α, 11β-DICHLORO-17, 21-DIOL-3, 20-DIONE 21-ACETATE is closely related to a flavonoid core, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

1, 4-PREGNADIEN-9α, 11β-DICHLORO-17, 21-DIOL-3, 20-DIONE 21-ACETATE (CAS 79-61-8) is a high-purity analytical reference standard with the molecular formula C23H28Cl2O5 and a molecular weight of 455.37 g/mol.

1, 4-PREGNADIEN-9α, 11β-DICHLORO-17, 21-DIOL-3, 20-DIONE 21-ACETATE (C23H28Cl2O5) contains a flavonoid core, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).

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.

CATO manufactures 1, 4-PREGNADIEN-9α, 11β-DICHLORO-17, 21-DIOL-3, 20-DIONE 21-ACETATE under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

Molecular FormulaC23H28Cl2O5
Molecular Weight455.37 g/mol
AppearancePale yellow to yellow crystalline powder. (slight halide-like odor, low volatility)
Purity97%+
StorageStore at room temperature, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)9.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957
Halogen ContentCl-containing

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