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See a temperature change on the tube
FreezeTech transport tubes include a reversible indicator patch that begins turning blue at 4°C and becomes dark blue at 0°C, according to MTC Bio. Choose sterile 5 or 10 mL tubes with attached screw caps.
5 or 10 mL
Capacity
4°C to 0°C
Color transition
500
Tubes per case
Designed for Your Workflow
Visible temperature cue
Patch starts turning blue at 4°C and darkens at 0°C.
Reversible indicator
Returns toward transparent grey as temperature approaches 4°C and above.
Attached screw caps
Self-standing virgin polypropylene tubes with 1¼-turn caps.
Sterile case supply
Five bags of 100 tubes per case.
Select the Right Format
Treat the color patch as a visible cue, not a calibrated temperature logger or a permanent record of excursions. Follow the transport requirements of the sample and packaging system.
Configurations and Ordering Units
C1825
Configuration: Transport Tube, with FreezeTech™ Temperature Indicator (turns blue at 0 degrees C), 5mL, attached screw-cap, printed graduations, sterile, 5 bags of 100 tubes and caps, 500/cs
Order unit: 500 per case
C1830
Configuration: Transport Tube, with FreezeTech™ Temperature Indicator (turns blue at 0 degrees C), 10mL, attached screw-cap, printed graduations, sterile, 5 bags of 100 tubes and caps, 500/cs
Order unit: 500 per case
Typical Applications
- Temperature-sensitive sample handling
- Cold-storage visual checks
- Laboratory sample transport
Selection and Use Tip
Treat the color patch as a visible cue, not a calibrated temperature logger or a permanent record of excursions. Follow the transport requirements of the sample and packaging system.
Frequently Asked Questions
When does the indicator turn blue?
MTC Bio states that it begins turning blue at 4°C and becomes dark blue when the tube and contents reach 0°C.
Is the color change permanent?
No. The patch returns toward its original transparent grey as temperature approaches 4°C and above.
Does the patch record past temperature excursions?
It is a reversible visual indicator, not a permanent excursion record or a calibrated temperature logger.
Which capacities are available?
C1825 is 5 mL and C1830 is 10 mL.
Are the caps attached?
Yes. These tubes are supplied with attached 1¼-turn screw caps.
Are the tubes sterile?
Yes. MTC Bio lists these FreezeTech tubes as sterile and RNase-, DNase- and pyrogen-free.
What are the tube dimensions?
The 5 mL tube is 16 × 60 mm; the 10 mL tube is 16 × 80 mm.
How many tubes are supplied?
Each case contains 500 tubes and caps, arranged in five bags of 100.
Related products and workflow options
- Alternative format: standard transport tubes — Compare screw-cap and sterility choices when a temperature-indicator patch is not required.
- Related workflow: LinkLabel laboratory label printer — For sample-identification workflows; choose cassette width and tape temperature rating for the vessel and storage conditions.
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