2.0 mL Conical Microcentrifuge Tubes with Tethered Flat-Top Cap — PPC, Blue, 250/Bag (214-3442-B80)
These 2.0 mL polypropylene copolymer (PPC) microcentrifuge tubes feature a permanently tethered flat-top cap, molded volume graduations, and a blue color for fast visual identification across multi-tube workflows. Supplied non-sterile in sealed 250/Bag packaging, the conical bottom geometry minimizes dead volume during pelleting and extraction steps. Manufactured under lot-to-lot dimensional controls, part number 214-3442-B80 delivers consistent fit in standard microcentrifuge rotor positions run after run.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 214-3442-B80 |
| Volume | 2.0 mL |
| Bottom Style | Conical |
| Cap Style | Tethered flat-top |
| Graduations | Molded volume markings |
| Material | Polypropylene Copolymer (PPC) |
| Color | Blue |
| Sterility | Non-Sterile |
| BPA / Phthalate Free | Yes |
| Pack Size | 250/Bag |
| Country of Origin | USA |
Applications
- PCR preparation and enzyme reaction setup requiring precise microvolume handling
- DNA and RNA extraction workflows where a low dead-volume conical bottom maximizes nucleic acid recovery
- Cell pelleting and microcentrifuge-based separation protocols
- Clinical microvolume sample processing in CAP- and CLIA-regulated laboratories requiring clear lot traceability
- High-throughput pipetting workflows where single-handed cap operation and tethered design prevent cap loss and cross-contamination
- High-density tube storage — the flat cap profile allows stable stacking
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids | Excellent |
| Dilute bases | Excellent |
| Methanol | Good |
| Isopropanol | Good |
| Acetonitrile | Good |
| Aromatic solvents (toluene, xylene, etc.) | Not recommended — verify before use |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
Quality & Procurement
Made in USA, these Caplugs® Evergreen microcentrifuge tubes are produced from BPA-free, phthalate-free polypropylene copolymer resin. PPC construction provides greater flexibility and impact resistance compared with standard PP homopolymer, reducing cracking risk during high-speed centrifuge runs. Sealed 250/Bag packaging maintains product integrity from warehouse receipt through point-of-use, and lot-to-lot consistency supports traceability requirements in ISO 15189, CAP, and CLIA environments. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with volume pricing available for institutional and grant-funded laboratories.
Frequently Asked Questions
Are these microcentrifuge tubes sterile?
No — they are supplied non-sterile. For applications requiring sterility, downstream sterilization methods compatible with polypropylene (such as gamma irradiation) should be evaluated for your specific protocol.
What is the advantage of polypropylene copolymer (PPC) over standard polypropylene?
PPC incorporates a comonomer that increases chain flexibility, giving the tubes greater impact resistance and reduced brittleness during high-speed centrifuge runs compared with standard PP homopolymer — an important consideration when spinning at maximum rotor speeds.
Can I write directly on the cap without a label?
Yes. The flat-top cap geometry provides a stable, smooth writing surface compatible with standard laboratory markers, which supports direct sample labeling and traceability without adhesive labels that can detach during centrifugation or freezer storage.
Will the tethered cap stay secure during centrifugation?
The cap is permanently attached via a flexible hinge rather than being a separate loose component, which eliminates cap loss during high-throughput pipetting. For specific centrifuge speed and rotor compatibility, consult your rotor manufacturer's guidelines for capped 2.0 mL microtubes.