Empty glass HPLC vial refers to a type of vial specifically designed for use in High-Performance Liquid Chromatography (HPLC) applications. HPLC is a technique used in analytical chemistry to separate, identify, and quantify components of a sample mixture.HPLC vials are made of glass to ensure chemical compatibility and to minimize sample contamination. These vials typically have a capacity ranging from 1.5 mL to 2 mL, although other sizes may be available. The vials have a narrow neck and a screw cap or crimp cap closure system to secure the contents and maintain the integrity of the sample during analysis.