(R,R)-Formoterol Impurity CAS 67346-49-0

Purity >90%In StockPharmacopoeial Impurity Standards
CAS No.67346-49-0
Molecular FormulaC19H24N2O4
Molecular Weight344.40 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

(R,R)-Formoterol Impurity CAS 67346-49-0 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 344.40 g/mol gives (R,R)-Formoterol Impurity distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies (R,R)-Formoterol Impurity (CAS 67346-49-0), a pharmacopoeial impurity reference standard (molecular formula C19H24N2O4, MW 344.40 g/mol) used for the identification and quantification of trace impurities in APIs.

Based on its molecular formula C19H24N2O4, (R,R)-Formoterol Impurity contains a flavonoid 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 344.40 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaC19H24N2O4
Molecular Weight344.40 g/mol
AppearancePale yellow to yellow crystalline powder
Purity>90%
StorageStore at 2-8°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
Degree of Unsaturation (DBE)9.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1976
Nitrogen Atoms2

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