Tobramycin Impurity 25 CAS CATO-C4X-220025

Purity ≥95%In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-220025
Molecular FormulaC13H26N4O8
Molecular Weight366.37 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Tobramycin Impurity 25 CAS CATO-C4X-220025 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Tobramycin Impurity 25.

Tobramycin Impurity 25 (CAS CATO-C4X-220025) is a certified pharmaceutical impurity reference standard with the molecular formula C13H26N4O8 and a molecular weight of 366.37 g/mol.

Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, Tobramycin Impurity 25 is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 366.37 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.

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 FormulaC13H26N4O8
Molecular Weight366.37 g/mol
AppearanceWhite to pale yellow crystalline powder
Purity≥95%
StorageStore at 2-8°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)3.0
UV AbsorptionUV-absorbing
Nitrogen Atoms4

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