Mexiletine EP Impurity B is used as a reference standard in pharmaceutical quality control laboratories for the analysis of mexiletine drug substances and drug products.

The purpose of Mexiletine EP Impurity B is to identify quantify and monitor this specified impurity during analytical testing to ensure that mexiletine complies with European Pharmacopoeia (EP) quality standards and regulatory requirements.

Mexiletine EP Impurity B is a specified related impurity of mexiletine that is defined in the European Pharmacopoeia and supplied as a certified reference material for use in validated analytical methods such as high-performance liquid chromatography (HPLC) during impurity profiling and quality assurance.