Sildenafil Impurity 74 CAS 1643-19-2

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.1643-19-2
Molecular FormulaC16H36N
Molecular WeightN/A
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Sildenafil Impurity 74 CAS 1643-19-2 chemical structure

Description

As a certified reference material (CRM), Sildenafil Impurity 74 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 Sildenafil Impurity 74 (CAS 1643-19-2), a pharmacopoeial impurity reference standard (molecular formula C16H36NBr, MW 322.38 g/mol) used for the identification and quantification of trace impurities in APIs.

Structurally, Sildenafil Impurity 74 (C16H36NBr) contains bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of -1.0, corresponding to approximately 0 ring(s) or double-bond equivalent(s). With a molecular weight of 322.38 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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 FormulaC16H36N Br
Molecular Weight322.38 g/mol
Purity>95%
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)-1.0
CAS Registry Year (est.)1957
Halogen ContentBr-containing
Nitrogen Atoms1

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