Epinastine Impurity 37 CAS 2044-27-1

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.2044-27-1
Molecular FormulaC6H7NS
Molecular Weight125.19 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Epinastine Impurity 37 CAS 2044-27-1 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.

CATO supplies Epinastine Impurity 37 (CAS 2044-27-1), a pharmacopoeial impurity reference standard (molecular formula C6H7NS, MW 125.19 g/mol) used for the identification and quantification of trace impurities in APIs.

Owing to a nitrile group, sulfur-containing functionality, an aromatic ring system, Epinastine Impurity 37 is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 125.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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.

Physical & Chemical Properties

Molecular FormulaC6H7NS
Molecular Weight125.19 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in methanol, acetonitrile, DMSO
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957
Nitrogen Atoms1
Sulfur Atoms1

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