Olopatadine Impurity 70 CAS CATO-C4X-171870

Purity ≥95%In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-171870
Molecular FormulaC20H21NO2
Molecular WeightN/A
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Olopatadine Impurity 70 CAS CATO-C4X-171870 chemical structure

Description

The occurrence of Olopatadine Impurity 70 is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

CATO supplies Olopatadine Impurity 70 (CAS CATO-C4X-171870), a pharmacopoeial impurity reference standard (molecular formula C20H21NO2HCl, MW 343.85 g/mol) used for the identification and quantification of trace impurities in APIs.

Olopatadine Impurity 70 (C20H21NO2HCl) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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.

CATO manufactures Olopatadine Impurity 70 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

Molecular FormulaC20H21NO2 HCl
Molecular Weight343.85 g/mol
AppearancePale yellow to yellow crystalline powder. (slight halide-like odor)
Purity≥95%
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)10.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
Halogen ContentCl-containing
Nitrogen Atoms1

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