. Parameter: =70 °C temp. range. Application(s): HPLC: suitable. Pore Size: 85 Å. . . Sigma-Aldrich 50201-U Partisil Si HPLC Column, 5 µm Particle Size, 4.6mm ID, 25cm Length. Country of Origin : United States. Part Number : 1181R18EA. Pack of : 1.