Dexamethasone Impurity 19 CAS CATO-C4X-116519

Description

The occurrence of Dexamethasone Impurity 19 is closely related to a sulfone group, a phosphate ester group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

CATO supplies Dexamethasone Impurity 19 (CAS CATO-C4X-116519), a pharmacopoeial impurity reference standard (molecular formula C22H32FO11PSHNa, MW 578.52 g/mol) used for the identification and quantification of trace impurities in APIs.

Dexamethasone Impurity 19 (C22H32FO11PSHNa) contains a sulfone group, a phosphate ester group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system. 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

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

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