1.5 mL Freestanding Flat-Bottom Cryogenic Tubes — PPC, Natural, Non-Sterile (220-3949-080)
These 1.5 mL MST™ cryogenic tubes from Caplugs® Evergreen feature a freestanding flat-bottom design and are molded from polypropylene copolymer (PPC) — a material specifically chosen for its flexibility and crack resistance at temperatures as low as -196°C, where standard PP homopolymer becomes brittle. Supplied non-sterile in bulk (1000/Bag), part number 220-3949-080 is engineered for liquid nitrogen, vapor-phase nitrogen, -80°C ULT freezer, and dry ice transport applications across biobanking, clinical, and research workflows.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 220-3949-080 |
| Volume | 1.5 mL |
| Tube Type | MST™ Cryogenic Freestanding Tube |
| Bottom Style | Flat Bottom (Freestanding) |
| Cap Style | Snap Cap |
| Cryogenic Rating | LN2 (-196°C) / Vapor-Phase Nitrogen / -80°C ULT |
| Material | Polypropylene Copolymer (PPC) |
| Color | Natural |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Biobanking and long-term biospecimen archiving in liquid nitrogen (LN2) or vapor-phase nitrogen storage systems
- Cell line cryopreservation and tissue sample archiving requiring reliable sealing at cryogenic temperatures
- DNA and RNA long-term cryogenic storage where tube integrity at -196°C is critical
- Serum and plasma aliquoting for clinical biospecimen programs under CAP, CLIA, or ISO 15189 quality frameworks
- -80°C ULT freezer storage of small-volume samples in high-density workflows
- Dry ice shipment of cryogenic samples requiring a crack-resistant, freestanding tube format
- Bench-top aliquoting and sample retrieval — the flat-bottom design allows upright placement without a tube rack
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, etc.) | Not recommended — use with caution |
Quality & Procurement
Made in USA at Caplugs® Evergreen ISO-certified facilities, these MST™ cryogenic tubes are produced from virgin-grade, FDA-registered PPC resin that is BPA-free and phthalate-free. Each bag ships with lot number and manufacturing date to support full traceability under CAP, CLIA, and ISO 15189 quality programs. LabSupplies.com is an authorized Caplugs® Evergreen dealer stocking 220-3949-080 from domestic inventory, which eliminates offshore lead time risk and supports uninterrupted supply for high-volume biobanking and clinical programs. Tiered pricing is available for institutional, grant-funded, and high-volume procurement.
Frequently Asked Questions
Are these cryogenic tubes sterile?
No — they are supplied non-sterile in 1000/Bag bulk packaging. For workflows requiring sterility, consider gamma-irradiated alternatives; these tubes are intended for non-sterile cryogenic storage and aliquoting applications.
Why is PPC used instead of standard polypropylene?
Polypropylene homopolymer (PP) becomes brittle at temperatures below approximately -40°C, increasing the risk of cracking during LN2 immersion or dry ice transport. Polypropylene copolymer (PPC) retains flexibility and impact resistance across the full cryogenic range down to -196°C, making it the preferred material for long-term biospecimen storage.
Can these tubes stand upright without a rack?
Yes — the flat-bottom freestanding design allows the tubes to stand upright on any bench surface, making them convenient for aliquoting, labeling, and sample retrieval without requiring a separate tube rack.
Do these tubes come with lot traceability documentation for regulated labs?
Yes — each bag of 220-3949-080 ships with lot number and manufacturing date, providing the documentation needed to satisfy traceability requirements under CAP, CLIA, and ISO 15189 accreditation programs.