Abiraterone Impurity 81 CAS 2118-31-2

Purity ≥95%In StockPharmacopoeial Impurity Standards
CAS No.2118-31-2
Molecular FormulaC21H32O
Molecular Weight300.48 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Abiraterone Impurity 81 CAS 2118-31-2 chemical structure

Description

As a certified reference material (CRM), Abiraterone Impurity 81 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.

CATO supplies Abiraterone Impurity 81 (CAS 2118-31-2), a pharmacopoeial impurity reference standard (molecular formula C21H32O, MW 300.48 g/mol) used for the identification and quantification of trace impurities in APIs.

Owing to a steroid core, a hydroxyl group, an ether linkage, Abiraterone Impurity 81 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 300.48 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.

Physical & Chemical Properties

Molecular FormulaC21H32O
Molecular Weight300.48 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity≥95%
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)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957

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