Fulvestrant Impurity 23 CAS CATO-C4X-191723

Purity >90%In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-191723
Molecular FormulaC58H86O7
Molecular Weight895.30 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Fulvestrant Impurity 23 CAS CATO-C4X-191723 chemical structure

Description

This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.

Fulvestrant Impurity 23 (CAS CATO-C4X-191723) is a certified pharmaceutical impurity reference standard with the molecular formula C58H86O7 and a molecular weight of 895.30 g/mol.

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system, Fulvestrant Impurity 23 is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 895.30 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

CATO manufactures Fulvestrant Impurity 23 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 FormulaC58H86O7
Molecular Weight895.30 g/mol
Purity>90%
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
Degree of Unsaturation (DBE)16.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present

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