2.0 mL Cryogenic Freestanding Tubes with Flat Top Natural Screw Cap — MST™ PPC, Sterile, 50/Bag
These Caplugs® Evergreen MST™ 2.0 mL cryogenic freestanding tubes (222-3953-PRF085) are manufactured from polypropylene copolymer (PPC) and supplied sterile, pre-assembled with flat top natural screw caps, 50 tubes per bag. The freestanding flat base provides upright stability without a rack, while the flat top cap surface accommodates 2D barcode labels and direct cryomarker writing for automated specimen tracking — making these tubes well suited to high-throughput biobank and clinical repository workflows. Rated to −196°C, they are engineered to withstand liquid nitrogen immersion, −80°C ULT freezer storage, and repeated freeze-thaw cycling without vial failure or cap loosening.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 222-3953-PRF085 |
| Volume | 2.0 mL |
| Tube Style | Cryogenic Freestanding |
| Bottom Style | Flat (Freestanding) |
| Cap Style | Flat Top Natural Screw Cap |
| Material | Polypropylene Copolymer (PPC) |
| Color | Natural |
| Sterility | Sterile |
| Cryogenic Rating | −196°C (liquid nitrogen) to ambient |
| Assembly | Pre-assembled (tube + cap) |
| Pack Size | 50/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Biobank and clinical specimen archiving at liquid nitrogen (−196°C) or −80°C ULT freezer temperatures
- Cell line cryopreservation requiring reliable screw-cap closure through freeze-thaw cycling
- Long-term nucleic acid (DNA/RNA) storage where sample integrity and sterility are critical
- Plasma and serum cryogenic storage for clinical and translational research pipelines
- Automated specimen tracking workflows using 2D barcode scanning from the top of the tube without removing tubes from storage boxes or racks
- High-density cryogenic storage box stacking enabled by the freestanding flat-base geometry
- CAP-, CLIA-, and ISO 15189-compliant laboratories requiring lot-traceable, sterile cryogenic consumables
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids | Excellent |
| Dilute bases | Excellent |
| Methanol | Good |
| Isopropanol | Good |
| Acetonitrile | Good |
| Aromatic / chlorinated solvents | Limited — verify before use |
Quality & Procurement
Made in USA, these MST™ cryogenic tubes are produced at ISO-certified manufacturing facilities from BPA-free, phthalate-free polypropylene copolymer resin. Pre-assembled and supplied sterile, each bag arrives ready for immediate use, eliminating manual assembly steps and reducing contamination risk. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with tiered volume pricing available for biobank programs, hospital systems, and grant-funded research institutions.
Frequently Asked Questions
Are these tubes sterile out of the bag?
Yes — each tube and flat top screw cap arrives pre-assembled and sterile, so no additional sterilization step is required before use.
Can these tubes be submerged directly in liquid nitrogen?
Yes. The PPC material and screw-cap design are rated to −196°C, making these tubes suitable for both vapor-phase and liquid-phase liquid nitrogen storage, as well as −80°C ULT freezers and repeated freeze-thaw cycling.
Does the flat top cap support 2D barcode scanning?
Yes. The flat top surface is specifically designed to accept 2D barcode labels and direct cryomarker writing, enabling automated top-read tracking systems to identify tubes without removing them from storage boxes or racks.
Do these tubes require a rack to stand upright?
No. The freestanding flat-base design allows the tubes to stand independently on any flat surface, simplifying bench handling during aliquoting or retrieval from storage boxes.