Thermo Scientific Freezer Tube 1.8 ml Sterile 400 Tubes

The Thermo Scientific (Nunc) CryoTube Vial described is a high-performance 1.8 mL storage vessel designed for the long-term preservation of biological samples in mechanical freezers (-80°C) or the vapor phase of liquid nitrogen. These vials are manufactured from medical-grade polypropylene, chosen for its ability to withstand extreme temperature fluctuations without compromising structural integrity.

A defining characteristic of this specific model is the Interior Thread design (male cap, female vial), which typically incorporates a silicone gasket.1 This creates a superior, leak-proof seal compared to external threads and keeps the outer profile of the tube smooth and flush, allowing it to fit more easily into standard cryoboxes without snagging.

The "Star Foot" feature refers to the specialized geometric shape molded into the base of the vial. This design is engineered to interlock with the grooves found in Nunc CryoTube racks. When placed in such a rack, the vial is locked in place and cannot rotate, enabling one-handed operation. This allows researchers to unscrew or tighten the cap using a single hand while holding a pipette in the other, significantly improving ergonomics and speed during high-throughput sample processing.

Despite the star-shaped exterior base, the interior of the tube maintains a round bottom (U-shape) to facilitate maximum sample recovery and reduce dead volume. They feature a large white writing area and printed graduations for easy sample identification.

Expiration Date 2023-09