Lipoic acid impurity N1 CAS 17370-41-1

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.17370-41-1
Molecular FormulaC8H14O4S2
Molecular Weight238.32 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Lipoic acid impurity N1 CAS 17370-41-1 chemical structure

Description

The occurrence of Lipoic acid impurity N1 is closely related to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

Lipoic acid impurity N1 (CAS 17370-41-1) is a certified pharmaceutical impurity reference standard with the molecular formula C8H14O4S2 and a molecular weight of 238.32 g/mol.

Based on its molecular formula C8H14O4S2, Lipoic acid impurity N1 contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 238.32 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry.

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 FormulaC8H14O4S2
Molecular Weight238.32 g/mol
Purity>95%
StorageStore in a cool place (≤25°C), keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO
StabilityHygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1961
Sulfur Atoms2

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