1-Methyl-4-Nitrosopiperazine is a nitrosamine impurity reference standard used in pharmaceutical analytical research, impurity profiling, and quality control applications. Supplied by Chemicea Pharmaceuticals, this compound is identified by CAS No. 16339-07-4 and CAT. No. CP-NIT023, with molecular formula C5H11N3O and molecular weight 129.16 g/mol. It is also known as N-Methyl-N'-Nitrosopiperazine (MNP/MeNP) and is relevant to analytical method development and impurity identification studies. This high-quality reference material supports laboratories involved in pharmaceutical research, method validation, and regulatory analytical requirements. Chemicea provides reliable impurity standards for accurate and consistent analytical testing.