• Designed for cryogenic storage of all types of cells or other specimens
• Conform to the IATA requirements for the transport of diagnostic specimens
• Non-pyrogenic according to the LAL test
• Non-toxic USP Class VI
• Sterile (SAL 10^-6) according to ISO 11137
• External thread recommended for mechanical freezers*
• Not recommended for use in the liquid phase of nitrogen
• CE marked
• Reclosable zippered bags
• Catalog No. and Lot No. printed on bags

^{* Warning
Do not use CryoTubes in the liquid phase of liquid nitrogen unless correctly sealed in Nunc CryoFlex™ Tubing (Cat. No. 343958). Improper use may cause liquefied nitrogen to be trapped inside the vial and lead to pressure build-up, resulting in possible explosion or biohazard release. Use appropriate safety procedures as outlined in the Nunc Cryopreservation Manual when handling and disposing of the CryoTubes.}