Clemastine Impurity 26 CAS 171296-35-8

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.171296-35-8
Molecular FormulaC7H10O5
Molecular Weight174.15 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Clemastine Impurity 26 CAS 171296-35-8 chemical structure

Description

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, Clemastine Impurity 26 is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 174.15 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).

As a process- or degradation-related impurity, Clemastine Impurity 26 (CAS 171296-35-8, C7H10O5) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.

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 FormulaC7H10O5
Molecular Weight174.15 g/mol
Purity97%+
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityMay oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)3.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)2005

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