1.5 mL Cryogenic Conical-Bottom Tubes — MST™ PPC, Natural, Non-Sterile (220-3948-080)
These 1.5 mL MST™ cryogenic conical-bottom tubes from Caplugs® Evergreen are constructed from polypropylene copolymer (PPC), a material selected specifically for its flexibility and crack resistance at cryogenic temperatures where standard polypropylene homopolymer becomes brittle. Supplied non-sterile in sealed 1000/Bag packaging, part number 220-3948-080 is rated for the full cryogenic range — from −80 °C ultra-low temperature (ULT) freezers through liquid nitrogen (LN₂) immersion at −196 °C — making these tubes a dependable choice for biobanks, clinical labs, and research institutions.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 220-3948-080 |
| Volume | 1.5 mL |
| Bottom Style | Conical Bottom |
| Cap Style | Snap Cap |
| Cryogenic Rating | LN₂ / Vapor-Phase N₂ / −80 °C ULT (to −196 °C) |
| Material | Polypropylene Copolymer (PPC) |
| Color | Natural |
| Sterility | Non-Sterile |
| BPA / Phthalate Free | Yes |
| Pack Size | 1000/Bag |
| Country of Origin | USA |
Applications
- Long-term cryogenic storage of cell lines, primary cells, and tissue samples in LN₂ or vapor-phase nitrogen
- DNA, RNA, and genomic material archiving in −80 °C ULT freezers
- Serum, plasma, and clinical biospecimen aliquoting and cryopreservation
- Biobanking workflows requiring consistent tube geometry and reliable cap seal integrity across large sample cohorts
- Dry ice shipment of frozen samples for inter-facility transport
- Post-thaw centrifugation and microvolume recovery — the conical bottom concentrates pellets and small-volume samples at the tube tip for complete retrieval
- CAP-, CLIA-, and ISO 15189-regulated environments where lot-level traceability is required
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids | Excellent |
| Dilute bases | Excellent |
| Methanol | Compatible |
| Isopropanol | Compatible |
| Acetonitrile | Compatible |
| Aromatic solvents (e.g., toluene, xylene) | Limited — not recommended for extended contact |
| Chlorinated solvents (e.g., chloroform, DCM) | Not recommended |
Quality & Procurement
Made in USA at Caplugs® Evergreen ISO-certified manufacturing facilities from virgin-grade, FDA-compliant PPC resin, these tubes are free of BPA, phthalates, and latex. Every bag ships with a lot number and manufacturing date to support full chain-of-custody documentation in CAP-, CLIA-, and ISO 15189-accredited laboratories. LabSupplies.com is an authorized Caplugs® Evergreen dealer maintaining domestic inventory, which means no offshore lead-time risk and same-business-day fulfillment for stocking quantities. Tiered pricing is available for high-volume and grant-funded procurement.
Frequently Asked Questions
Are these tubes suitable for direct liquid nitrogen immersion?
Yes — the PPC construction is rated for liquid nitrogen storage at −196 °C as well as vapor-phase nitrogen and −80 °C ULT freezer conditions. PPC retains flexibility at cryogenic temperatures where standard polypropylene homopolymer becomes brittle, reducing the risk of cracking or seal failure during freeze-thaw cycles.
Are these tubes sterile?
No — these tubes are supplied non-sterile. For applications requiring sterility, confirm whether your workflow permits pre-use decontamination, or contact LabSupplies.com to inquire about sterile alternatives in the MST™ line.
What does the conical bottom design offer compared to a round-bottom tube?
The conical bottom concentrates cell pellets, precipitates, and small-volume samples at the tip of the tube, enabling complete microvolume recovery after thawing and centrifugation — an important advantage in biobanking and cell-culture workflows where minimizing sample loss is critical.
Does each bag carry lot-number documentation for regulated laboratories?
Yes — every 1000/Bag unit of 220-3948-080 is labeled with a lot number and manufacturing date, supporting the traceability requirements of CAP-, CLIA-, and ISO 15189-accredited clinical and research laboratories.