Ketotifen Impurity 19 CAS 34580-20-6

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.34580-20-6
Molecular FormulaC18H17NOS
Molecular Weight295.40 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Ketotifen Impurity 19 CAS 34580-20-6 chemical structure

Description

As a certified reference material (CRM), Ketotifen Impurity 19 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 Ketotifen Impurity 19 (CAS 34580-20-6), a pharmacopoeial impurity reference standard (molecular formula C18H17NOS, MW 295.40 g/mol) used for the identification and quantification of trace impurities in APIs.

Ketotifen Impurity 19 (C18H17NOS) contains a steroid core, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility; 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).

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 FormulaC18H17NOS
Molecular Weight295.40 g/mol
Purity>95%
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)11.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1966
Nitrogen Atoms1
Sulfur Atoms1

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