Sitafloxacin Isomer Impurity 4(RSR) CAS 127199-06-8

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.127199-06-8
Molecular FormulaC19H18ClF2N3O3
Molecular Weight409.81 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Sitafloxacin Isomer Impurity 4(RSR) CAS 127199-06-8 chemical structure

Description

Based on its molecular formula C19H18ClF2N3O3, Sitafloxacin Isomer Impurity 4(RSR) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 409.81 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

CATO supplies Sitafloxacin Isomer Impurity 4(RSR) (CAS 127199-06-8), a pharmacopoeial impurity reference standard (molecular formula C19H18ClF2N3O3, MW 409.81 g/mol) used for the identification and quantification of trace impurities in APIs.

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.

CATO manufactures Sitafloxacin Isomer Impurity 4(RSR) under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

Molecular FormulaC19H18ClF2N3O3
Molecular Weight409.81 g/mol
AppearancePale yellow to yellow crystalline powder. (slight halide-like odor, low volatility)
Purity>95%
StorageStore in a cool place (≤25°C), protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)11.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1993
Halogen ContentF/Cl-containing
Nitrogen Atoms3

Related Sitafloxacin Standards

Recommended Standards

Why CATO?