Ergocalciferol EP Impurity B CAS 57-87-4

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.57-87-4
Molecular FormulaC28H44O
Molecular Weight396.65 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Ergocalciferol EP Impurity B CAS 57-87-4 chemical structure

Description

CATO supplies Ergocalciferol EP Impurity B (CAS 57-87-4), a pharmacopoeial impurity reference standard (molecular formula C28H44O, MW 396.65 g/mol) used for the identification and quantification of trace impurities in APIs.

Ergocalciferol EP Impurity B (C28H44O) contains a steroid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

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 Ergocalciferol EP Impurity B 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 FormulaC28H44O
Molecular Weight396.65 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)7.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957

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