Deactivated Clear Glass 12 x 32 mm Screw Neck Vial with Cap and Preslit PTFE/Silicone Septum, 2 mL Volume, 100/pk. When working with highly polar analytes that may associate with the polar glass surface, chromatographers choose deactivated vials as the effective vial of choice. These glass vials are treated with gas-phase, reactive organosilane