Calcitriol Impurity 3 CAS CATO-C4X-15103

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-15103
Molecular FormulaC28H46O3
Molecular Weight430.66 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Calcitriol Impurity 3 CAS CATO-C4X-15103 chemical structure

Description

As a certified reference material (CRM), Calcitriol Impurity 3 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Calcitriol Impurity 3 (CAS CATO-C4X-15103) is a certified pharmaceutical impurity reference standard with the molecular formula C28H46O3 and a molecular weight of 430.66 g/mol.

Owing to a steroid core, a hydroxyl group, an ether linkage, Calcitriol Impurity 3 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 430.66 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.

Physical & Chemical Properties

Molecular FormulaC28H46O3
Molecular Weight430.66 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at room temperature, protect from light, keep sealed and dry
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present

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