Rapamycin Impurity 20 (Mixture of Isomers) CAS CATO-C4X-174620

Description

The occurrence of Rapamycin Impurity 20 (Mixture of Isomers) is closely related to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

CATO supplies Rapamycin Impurity 20 (Mixture of Isomers) (CAS CATO-C4X-174620), a pharmacopoeial impurity reference standard (molecular formula C52H81NO12, MW 912.22 g/mol) used for the identification and quantification of trace impurities in APIs.

Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Rapamycin Impurity 20 (Mixture of Isomers) is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 912.22 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.

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

As a certified reference material (CRM), Rapamycin Impurity 20 (Mixture of Isomers) 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.

Physical & Chemical Properties

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