Eldecalcitol Impurity 33 CAS 100928-05-0

Description

Compared with other compounds in its class, the molecular weight of 436.49 g/mol gives Eldecalcitol Impurity 33 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Eldecalcitol Impurity 33 (CAS 100928-05-0) is a certified pharmaceutical impurity reference standard with the molecular formula C19H37IOSi and a molecular weight of 436.49 g/mol.

The molecular framework of Eldecalcitol Impurity 33 (C19H37IOSi) is characterized by a hydroxyl group, an ether linkage, iodine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

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