2.0 mL Tethered-Cap Microcentrifuge Tubes — Conical Bottom, PPC, Green, 250/Bag (214-3442-G80)
These 2.0 mL polypropylene copolymer (PPC) microcentrifuge tubes feature a permanently attached tethered flat-top cap, molded volume graduations, and a green color for fast visual identification in multi-tube workflows. Supplied non-sterile in sealed 250/Bag packaging, they are engineered for PCR preparation, DNA/RNA extraction, cell pelleting, and other high-throughput microvolume applications where cap retention and sample traceability are critical. The conical bottom geometry minimizes dead volume during pelleting and pipette recovery, while the flat cap provides a stable writing surface for direct marker labeling.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 214-3442-G80 |
| Volume | 2.0 mL |
| Bottom Style | Conical |
| Cap Style | Tethered flat-top |
| Graduations | Molded volume markings |
| Material | Polypropylene Copolymer (PPC) |
| Color | Green |
| Sterility | Non-Sterile |
| BPA / Phthalate Free | Yes |
| Pack Size | 250/Bag |
| Country of Origin | USA |
Applications
- PCR and enzyme reaction setup requiring reliable cap closure and contamination control
- DNA and RNA extraction workflows benefiting from low dead-volume conical geometry
- Cell pelleting and microvolume centrifugation at high rotor speeds
- Clinical microvolume sample processing where CAP/CLIA lot traceability is required
- High-density storage configurations using flat-cap tube stacking
- Multi-sample tracking workflows where green color coding differentiates sample types at a glance
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) | Not recommended — use with caution |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
Quality & Procurement
Made in USA, these Caplugs® Evergreen microcentrifuge tubes are manufactured from BPA-free, phthalate-free polypropylene copolymer (PPC) resin, which delivers greater flexibility and impact resistance than standard PP homopolymer — reducing the risk of tube cracking during high-speed microcentrifuge runs. PPC construction also means molded volume graduations remain permanent and solvent-resistant across standard molecular biology reagent matrices. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with lot traceability documentation available to support CAP, CLIA, and ISO 15189 laboratory quality programs. Tiered pricing is available for high-volume institutional and grant-funded purchasers.
Frequently Asked Questions
Are these microcentrifuge tubes sterile?
No — they are supplied non-sterile in sealed 250/Bag packaging. For applications requiring sterile consumables, such as cell culture or certain clinical assays, a sterile alternative should be selected.
What is the advantage of a tethered cap over a separate snap-on cap?
The tethered cap is permanently attached via a flexible hinge, so it cannot be misplaced or accidentally swapped between tubes during high-throughput pipetting. This reduces cross-contamination risk and keeps workflows moving without pausing to retrieve loose caps.
Why use polypropylene copolymer (PPC) instead of standard polypropylene?
PPC offers improved flexibility and impact toughness compared to standard PP homopolymer, making it more resistant to cracking under the stress of repeated high-speed centrifugation. It retains the same broad chemical compatibility with aqueous buffers, dilute acids and bases, and common molecular biology solvents.
Will these tubes fit standard microcentrifuge rotors?
Yes — the 2.0 mL conical format is dimensionally consistent with standard microcentrifuge rotor positions. Lot-to-lot dimensional control ensures a reliable fit, though confirming compatibility with your specific rotor model is always recommended when switching consumable suppliers.