0.4 mL Conical Microcentrifuge Tubes — LDPE, Natural, Snap Cap, 1000/Bag
These 0.4 mL conical-bottom microcentrifuge tubes are molded from virgin-grade Low-Density Polyethylene (LDPE) and supplied non-sterile in sealed 1000/Bag packaging for high-throughput bench and clinical workflows. The conical tip geometry concentrates microvolume pellets at the bottom of the tube for complete, low-dead-volume recovery after centrifugation, while the snap cap provides reliable closure for sample storage and transport. Lot-to-lot dimensional consistency ensures a reliable fit in standard microcentrifuge rotor positions across routine laboratory use.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 214-3714-020 |
| Volume | 0.4 mL |
| Bottom Style | Conical |
| Cap Style | Snap Cap |
| Material | Low-Density Polyethylene (LDPE) |
| Color | Natural |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- PCR preparation and enzyme reaction setup requiring microvolume precision
- DNA and RNA extraction with low dead-volume pellet recovery
- Protein precipitation and cell pelleting by centrifugation
- Sample aliquoting and short- or long-term microvolume sample storage
- Clinical microvolume sample processing in CAP-, CLIA-, and ISO 15189-accredited laboratories
- Automated liquid handling workflows requiring standard 0.4 mL tube geometry
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids | Excellent |
| Dilute bases | Excellent |
| Methanol / isopropanol / ethanol | Good |
| Acetonitrile | Good |
| Aromatic solvents (toluene, xylene) | Use with caution — verify before use |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
Quality & Procurement
Made in USA at Caplugs® Evergreen ISO-certified manufacturing facilities using domestically sourced, FDA-registered virgin-grade LDPE resin, these tubes are free of BPA and phthalates. Each sealed bag carries full lot-number and manufacturing-date traceability to support CAP, CLIA, and ISO 15189 laboratory accreditation documentation. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory to eliminate offshore lead-time risk, with tiered pricing available for high-volume institutional and grant-funded accounts.
Frequently Asked Questions
Are these microcentrifuge tubes sterile?
No — the 214-3714-020 tubes are supplied non-sterile. For most molecular biology, biochemistry, and general sample-processing workflows this is standard practice; DNase/RNase-free or sterile options should be sourced separately if your protocol requires them.
Why use LDPE instead of polypropylene for microcentrifuge tubes?
LDPE is notably more flexible than polypropylene, which reduces the risk of tube cracking during handling and centrifugation. The flexibility also allows controlled sample dispensing directly through the tube wall in squeeze-transfer techniques. For applications that require autoclaving, however, polypropylene would be the appropriate choice, as LDPE is not autoclavable.
Will these tubes fit standard microcentrifuge rotors?
Yes — the conical 0.4 mL format is manufactured to consistent dimensional tolerances for compatibility with standard microcentrifuge rotor positions. If your rotor specifies a particular tube diameter or height, verify against your instrument's documentation before switching from your current supply.
How does the conical bottom help with pellet recovery?
The tapered conical tip concentrates the pellet at a single defined point at the bottom of the tube, minimizing dead volume and allowing near-complete recovery of small or precious samples after centrifugation — a particular advantage in microvolume DNA/RNA extraction and cell-pelleting workflows.