1st hydrolytic class and silanized glass; Vials are packaged in a cleanroom Temperature limit for PTFE/Silicone septa: -60°C up to 200°C Aijiren Vials and Sample Containment Solutions Brochure. However, substandard vials, caps, and septa can lead to sample loss, GC, GC/MS, or GC Headspace: www.Aijiren.com/chem/productivityGC ... HPLC and GC.