2.0 mL Cryogenic Freestanding Tubes, Flat Top Natural Screw Cap — PPC, Sterile, 50/Bag
These MST™ 2.0 mL cryogenic freestanding tubes ship pre-assembled with flat top natural screw caps and are manufactured from polypropylene copolymer (PPC) for reliable performance from liquid nitrogen immersion at −196°C through −80°C ultra-low temperature freezer storage and repeated freeze-thaw cycling. The flat freestanding base provides upright stability without a rack, while the flat top cap surface accommodates 2D barcode labels and direct cryomarker writing for automated biobank specimen tracking. Available as part number 222-3953-F085, these tubes are supplied sterile in bags of 50.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 222-3953-F085 |
| Volume | 2.0 mL |
| Tube Type | Cryogenic Freestanding |
| Bottom Style | Flat Bottom (Freestanding) |
| Cap Style | Flat Top Natural Screw Cap |
| Material | Polypropylene Copolymer (PPC) |
| Color | Natural |
| Cryogenic Rating | −196°C (liquid nitrogen) to ambient |
| Sterility | Sterile |
| Assembly | Pre-assembled (tube + cap) |
| Pack Size | 50/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Biobank specimen archiving requiring upright freestanding storage in high-density cryogenic boxes
- Cell line cryopreservation in liquid nitrogen vapor phase or immersion at −196°C
- Long-term nucleic acid (DNA/RNA) storage at −80°C ultra-low temperature
- Plasma and serum cryogenic storage with repeated freeze-thaw cycling
- Automated specimen tracking workflows using top-read 2D barcode scanners — the flat cap surface accepts printed labels or direct cryomarker writing without removing tubes from storage boxes
- CAP/CLIA and ISO 15189 regulated laboratories requiring lot-traceable, sterile cryogenic consumables
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids | Excellent |
| Dilute bases | Excellent |
| Methanol | Compatible |
| Isopropanol | Compatible |
| Acetonitrile | Compatible |
| Aromatic solvents (toluene, xylene) | Use with caution — verify before use |
Quality & Procurement
Made in USA at ISO-certified manufacturing facilities, these Caplugs® Evergreen MST™ cryogenic tubes are produced from BPA-free, phthalate-free PPC resin and are supplied sterile for immediate use in regulated laboratory environments. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory, with volume and institutional pricing available for biobanks, hospital systems, and research institutions managing high-throughput cryogenic storage programs.
Frequently Asked Questions
Are these cryogenic tubes safe for direct liquid nitrogen immersion?
Yes — the PPC material and threaded screw cap are rated to −196°C, making these tubes suitable for both liquid nitrogen vapor phase and immersion storage as well as −80°C ULT freezer use.
Do the tubes arrive pre-assembled with caps attached?
Yes — each bag of 50 contains tubes pre-assembled with the flat top natural screw cap, so they are ready for immediate labeling and sample loading without separate cap handling.
Can I use automated 2D barcode readers with these tubes?
The flat top cap design provides a flat surface specifically suited for 2D barcode labels and top-read automated scanning systems, allowing tube identification without removing the tube from its storage box or rack.
Are these tubes compatible with standard cryogenic storage boxes?
Yes — the flat freestanding base allows the tubes to stand upright without a rack and fits standard cryogenic storage box formats used in biobank and research freezer workflows. Confirm box cell dimensions against the tube diameter before ordering in high volume.