Maxacalcitol impurity 43 CAS 81506-25-4

Description

Compared with other compounds in its class, the molecular weight of 417.17 g/mol gives Maxacalcitol impurity 43 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Maxacalcitol impurity 43 (CAS 81506-25-4), a pharmacopoeial impurity reference standard (molecular formula C21H41ClO2Si2, MW 417.17 g/mol) used for the identification and quantification of trace impurities in APIs.

Structurally, Maxacalcitol impurity 43 (C21H41ClO2Si2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 1.0, corresponding to approximately 1 ring(s) or double-bond equivalent(s). With a molecular weight of 417.17 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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.

CATO manufactures Maxacalcitol impurity 43 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

Why CATO?

• ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
• 130,000+ catalog items in stock, COA supplied with every batch
• Worldwide shipping with full export documentation (HS code guidance available)
• Technical support: +86 18665070610 / Nicole.chen@cato-chem.com