Topiroxostat Impurity 42 CAS CATO-C4X-105542

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-105542
Molecular FormulaC8H5N5O
Molecular Weight187.16 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Topiroxostat Impurity 42 CAS CATO-C4X-105542 chemical structure

Description

As a certified reference material (CRM), Topiroxostat Impurity 42 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.

CATO supplies Topiroxostat Impurity 42 (CAS CATO-C4X-105542), a pharmacopoeial impurity reference standard (molecular formula C8H5N5O, MW 187.16 g/mol) used for the identification and quantification of trace impurities in APIs.

Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Topiroxostat Impurity 42 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 187.16 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).

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.

Physical & Chemical Properties

Molecular FormulaC8H5N5O
Molecular Weight187.16 g/mol
AppearancePale yellow to yellow crystalline powder. (faint amine-like odor)
Purity>95%
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)9.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
Nitrogen Atoms5

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