Ac-D-Cys(Spy)-D-Ala-D-Arg-D-Arg-D-Arg-D-Ala-D-Arg-NH2 CAS CATO-C4X-324715

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-324715
Molecular FormulaC40H71N21O8S2
Molecular Weight1038.26 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Ac-D-Cys(Spy)-D-Ala-D-Arg-D-Arg-D-Arg-D-Ala-D-Arg-NH2 CAS CATO-C4X-324715 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 1038.26 g/mol gives Ac-D-Cys(Spy)-D-Ala-D-Arg-D-Arg-D-Arg-D-Ala-D-Arg-NH2 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Ac-D-Cys(Spy)-D-Ala-D-Arg-D-Arg-D-Arg-D-Ala-D-Arg-NH2 (CAS CATO-C4X-324715), a pharmacopoeial impurity reference standard (molecular formula C40H71N21O8S2, MW 1038.26 g/mol) used for the identification and quantification of trace impurities in APIs.

Based on its molecular formula C40H71N21O8S2, Ac-D-Cys(Spy)-D-Ala-D-Arg-D-Arg-D-Arg-D-Ala-D-Arg-NH2 contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 1038.26 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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), Ac-D-Cys(Spy)-D-Ala-D-Arg-D-Arg-D-Arg-D-Ala-D-Arg-NH2 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

Molecular FormulaC40H71N21O8S2
Molecular Weight1038.26 g/mol
Purity>95%
StorageStore in a cool place (≤25°C), protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)16.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
Nitrogen Atoms21
Sulfur Atoms2

Recommended Standards

Why CATO?