Acetylcysteine Impurity 10 (N,S-Carboxymethyl L-Cysteine) TFA salt CAS 907565-13-3(Free acid)

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.907565-13-3(Free acid)
Molecular FormulaC7H11NO6S
Molecular WeightN/A
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Acetylcysteine Impurity 10 (N,S-Carboxymethyl L-Cysteine) TFA salt CAS 907565-13-3(Free acid) chemical structure

Description

Compared with other compounds in its class, the molecular weight of 351.25 g/mol gives Acetylcysteine Impurity 10 (N,S-Carboxymethyl L-Cysteine) TFA salt distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Acetylcysteine Impurity 10 (N,S-Carboxymethyl L-Cysteine) TFA salt (CAS 907565-13-3(Free acid)), a pharmacopoeial impurity reference standard (molecular formula C7H11NO6SC2HF3O2, MW 351.25 g/mol) used for the identification and quantification of trace impurities in APIs.

The molecular framework of Acetylcysteine Impurity 10 (N,S-Carboxymethyl L-Cysteine) TFA salt (C7H11NO6SC2HF3O2) is characterized by a carbohydrate-derived structure, an amide group, a sulfone group, fluorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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 FormulaC7H11NO6S C2HF3O2
Molecular Weight351.25 g/mol
Purity>95%
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO
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)3.0
UV AbsorptionUV-absorbing
Halogen ContentF-containing
Nitrogen Atoms1
Sulfur Atoms1

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