Chlorzoxazone Impurity N1 CAS 57718-28-2

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.57718-28-2
Molecular FormulaC7H7ClN2O2
Molecular Weight186.60 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Chlorzoxazone Impurity N1 CAS 57718-28-2 chemical structure

Description

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.

Chlorzoxazone Impurity N1 (CAS 57718-28-2) is a certified pharmaceutical impurity reference standard with the molecular formula C7H7ClN2O2 and a molecular weight of 186.60 g/mol.

Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, Chlorzoxazone Impurity N1 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 186.60 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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.

Physical & Chemical Properties

Molecular FormulaC7H7ClN2O2
Molecular Weight186.60 g/mol
AppearanceOff-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor)
Purity>95%
StorageStore at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation
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)5.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1973
Halogen ContentCl-containing
Nitrogen Atoms2

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