Tiotropium Impurity 29 CAS 213967-57-8

Purity >90%In StockPharmacopoeial Impurity Standards
CAS No.213967-57-8
Molecular FormulaC4O6
Molecular Weight144.04 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Tiotropium Impurity 29 CAS 213967-57-8 chemical structure

Description

The occurrence of Tiotropium Impurity 29 is closely related to a carbohydrate-derived structure in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

Tiotropium Impurity 29 (CAS 213967-57-8) is a certified pharmaceutical impurity reference standard with the molecular formula C4O6 and a molecular weight of 144.04 g/mol.

Structurally, Tiotropium Impurity 29 (C4O6) contains a carbohydrate-derived structure. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 144.04 g/mol, it falls into the low-molecular-weight range. 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).

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

Molecular FormulaC4O6
Molecular Weight144.04 g/mol
Purity>90%
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityMay oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)5.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)2018

Related Tiotropium Standards

Recommended Standards

Why CATO?