Cryo Tubes

What is the difference between internal and external thread cryo tubes?

Internal and external thread cryo tubes mainly differ in the thread position and cap engagement design. Internal thread cryo tubes have the thread inside the tube mouth and are often selected for compact capped height and storage compatibility. External thread cryo tubes have the thread on the outside of the tube mouth, leaving a clearer opening for routine sample access and handling. The final choice should consider sample access frequency, sealing design, cryo box compatibility, and storage workflow.

Are sterile cryo tubes available?

Yes. Kelabscience supplies sterile internal and external thread cryo tubes in 1 ml, 2 ml, 3 ml, 4 ml, and 5 ml options. Non-sterile cryo tubes are also available, including 1.8 ml color-coded cryo tubes and selected additional volume options. Sterility, packaging format, and carton quantity should be confirmed according to the required specification.

Can these cryo tubes be used for −80 °C freezer storage?

Yes. Cryo tubes are commonly used for low-temperature sample storage in −80 °C laboratory freezers. They are suitable for biological samples, cells, serum, plasma, reagents, and other laboratory materials that require organized frozen storage. The working volume should be lower than the nominal capacity to allow sufficient headspace during freezing.

Can these cryo tubes be used in liquid nitrogen storage systems?

Selected cryo tube models may be suitable for cryogenic storage workflows, including vapor-phase liquid nitrogen storage, depending on product configuration and handling conditions. Direct immersion in liquid-phase liquid nitrogen is not recommended unless the product is explicitly specified for that use. Please confirm the tube model, sealing design, working volume, and storage conditions before ordering.

What working volume should be used for cryogenic storage?

For cryogenic storage, the working volume should be lower than the nominal tube capacity. Leaving sufficient headspace helps accommodate sample expansion during freezing and may reduce the risk of leakage, cap stress, or tube deformation. The exact working volume may vary depending on sample type, freezing method, and storage conditions.

Do the cryo tubes come with silicone gasket sealing caps?

Silicone gasket sealing caps are available for selected cryo tube models. They help support secure closure during low-temperature sample storage and routine handling. Gasket configuration may vary by volume, thread type, and product model, so it should be confirmed before bulk ordering.

Are 1.8 ml color-coded cryo tubes available?

Yes. Kelabscience supplies 1.8 ml color-coded cryo tubes in blue, orange, red, white, yellow, and brown cap options. These tubes are commonly supplied as non-sterile standard products and are useful for routine sample identification, batch organization, and laboratory storage management. Sterile packaging may be available upon request depending on order quantity and production arrangement.

How should I choose the right cryo tube configuration?

The right configuration depends on volume, thread type, sterility requirement, cap color, sealing design, bottom type, storage box compatibility, and sample access frequency. For bulk purchasing or distributor inquiries, please provide your required volume, internal or external thread preference, sterility requirement, packaging format, and estimated quantity for configuration consultation.