I-CHEM Low Level TOC 40-ml clear vials meet all performance-based specifications for VOC analysis in accordance with current EPA guidelines for contaminant-free sample containers. Certified for low level TOC analysis and certified to contain less than 50 ppg TOC, each vial is manufactured from clear borosilicate glass and has a Teflon®/silicone septum closure. Each vial is bar-coded with an individual, manually- and laser-readable container number and lot number traceable to Certificate of Analysis, included with each case. Unattached sample analysis labels are also included with each case of vials. Nagle co. 75 Panorama Creek Dr., P.O. Box 20365 Rochester, NY, 14602