格隆溴铵杂质28 CAS 207856-83-5

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.207856-83-5
Molecular FormulaC18H25NO3
Molecular Weight303.40 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

格隆溴铵杂质28 CAS 207856-83-5 chemical structure

Description

CATO supplies 格隆溴铵杂质28 (CAS 207856-83-5), a pharmacopoeial impurity reference standard (molecular formula C18H25NO3, MW 303.40 g/mol) used for the identification and quantification of trace impurities in APIs.

Based on its molecular formula C18H25NO3, 格隆溴铵杂质28 contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 303.40 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.

As a certified reference material (CRM), 格隆溴铵杂质28 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.

Physical & Chemical Properties

Molecular FormulaC18H25NO3
Molecular Weight303.40 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)7.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2016
Nitrogen Atoms1

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