HPLC column NUCLEODUR® 300-5 C4 ec is a liquid chromatography column configured for HPLC work in analytical laboratories. The 300-5 C4 ec designation identifies the stationary-phase format, supplied here in a 150 × 4 mm column geometry as a single unit. With a weight of 0,261 kg, the packed column is intended for installation in standard HPLC systems used for environmental analysis and general liquid chromatography. NUCLEODUR® hardware from manufacturer MACHEREY-NAGEL supports reversed-phase separations based on C4 ec chemistry under routine laboratory conditions. The 150 mm bed length and 4 mm internal diameter suit analytical-scale methods where controlled flow and solvent consumption matter. Pack size is one piece, convenient for method setup, routine assays, or replacement within existing instrument fleets. Laboratories engaged in environmental monitoring and broader chromatographic applications can integrate this column into conventional HPLC workflows for sample characterization. The endcapped C4 phase profile is aligned with moderately hydrophobic retention behaviour typical of reversed-phase method requirements in research and quality-control settings.