1.5 mL Freestanding Cryogenic Tubes — MST™, PPC, Natural with Printed Graduations (220-3949-PR080)
These 1.5 mL freestanding flat-bottom cryogenic tubes are constructed from polypropylene copolymer (PPC) — a material that retains flexibility and crack resistance at cryogenic temperatures where standard polypropylene homopolymer becomes brittle — making them suitable for liquid nitrogen (LN₂, −196 °C), vapor-phase nitrogen, and −80 °C ultra-low temperature (ULT) freezer storage. Printed graduation markings allow direct volume monitoring during sample addition and aliquoting, and the flat-bottom design lets tubes stand upright on the bench without a rack. Supplied non-sterile in sealed 1000/Bag packaging, part number 220-3949-PR080 is a straightforward choice for high-throughput biobanking and cryopreservation workflows.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 220-3949-PR080 |
| Volume | 1.5 mL |
| Tube Series | MST™ Cryogenic Freestanding Tube |
| Bottom Style | Flat Bottom (Freestanding) |
| Cap Style | Snap Cap |
| Cryogenic Rating | LN₂ (−196 °C) / Vapor-Phase Nitrogen / −80 °C ULT |
| Graduations | Printed |
| Material | Polypropylene Copolymer (PPC) |
| Color | Natural |
| Sterility | Non-Sterile |
| BPA / Phthalate Free | Yes |
| Pack Size | 1000/Bag |
| Country of Origin | USA |
Applications
- Biobanking and long-term biospecimen archiving in LN₂ or vapor-phase nitrogen dewars
- Cell line and primary cell cryopreservation at −80 °C and below
- DNA, RNA, and genomic library long-term cryogenic storage
- Serum and plasma aliquot cryopreservation for clinical and research use
- Tissue sample archiving in ultra-low temperature freezers
- Dry ice shipment of cryogenic samples
- Volume monitoring during aliquoting, with printed graduations visible without removing tubes from storage
- CAP/CLIA and ISO 15189 workflows requiring lot-traceable 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, etc.) | Use with caution — not recommended for prolonged contact |
Quality & Procurement
Made in USA at Caplugs® Evergreen ISO-certified manufacturing facilities, these tubes are produced from virgin-grade, FDA-registered PPC resin that is BPA-free and phthalate-free. The sealed 1000/Bag format preserves product integrity from warehouse receipt through point-of-use and supports lot traceability requirements in regulated laboratory environments. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with tiered pricing available for institutional, biobank, and grant-funded accounts.
Frequently Asked Questions
Are these tubes rated for liquid nitrogen immersion, or only vapor-phase storage?
These MST™ cryogenic tubes are rated for both direct liquid nitrogen immersion (−196 °C) and vapor-phase nitrogen storage, as well as −80 °C ULT freezers and dry ice shipment.
Why is PPC used instead of standard polypropylene?
Polypropylene copolymer (PPC) retains flexibility and impact resistance at cryogenic temperatures, whereas standard PP homopolymer can become brittle below approximately −40 °C and risk cracking during freeze-thaw cycles or when handled cold.
Do the printed graduations remain legible after repeated freeze-thaw cycles?
Yes — the printed graduations are designed to withstand cryogenic temperatures and repeated freeze-thaw cycles, maintaining legibility through long-term storage applications.
Are these tubes supplied sterile?
No — the 220-3949-PR080 tubes are supplied non-sterile in 1000/Bag packaging. If your application requires sterile cryogenic tubes, contact LabSupplies.com to discuss alternative Caplugs® Evergreen options.