The most common material for most routine HPLC applications. Its high strength (burst pressure >8000 psi), general inertness and resistance to corrosion make it the standard material for HPLC plumbing. Stainless steel can corrode under extremes of pH, and it can bind proteins as well as contribute metal ions to mobile phases. These properties make stainless steel incompatible with the analysis of many biomolecules and the use of buffers with high ionic strength. Bulk stainless steel tubing from SIS is solvent-cleaned and baked prior to shipment.