1.8 mL Conical Microcentrifuge Tubes — HDPE, Natural, 1,000/Bag (214-3739-020)
These 1.8 mL conical microcentrifuge tubes are precision-molded from virgin High-Density Polyethylene (HDPE) for centrifugation, sample preparation, and storage workflows in clinical, research, and industrial laboratories. The conical bottom geometry minimizes dead volume and ensures complete pellet recovery — a critical factor in precipitation, nucleic acid isolation, and cell harvest protocols where sample yield directly affects downstream assay performance. Supplied non-sterile in a sealed bulk bag of 1,000, they ship ready for high-throughput use straight from stockroom to bench.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 214-3739-020 |
| Capacity | 1.8 mL |
| Bottom Geometry | Conical |
| Tube OD | 11 mm |
| Material | High-Density Polyethylene (HDPE) |
| Color | Natural |
| Sterility | Non-Sterile |
| Pack Size | 1,000/Bag |
| BPA / Phthalates | BPA-free; no phthalate plasticizers |
| Country of Origin | USA (California) |
Applications
- Microcentrifugation and high-speed pelleting of cells, beads, and precipitates
- DNA, RNA, and protein isolation via spin-column extraction protocols
- PCR and qPCR reagent and template preparation
- Short- and long-term sample storage of aqueous buffers, sera, and biological specimens
- Ethanol precipitation, isopropanol precipitation, and other nucleic acid concentration workflows
- Industrial and clinical chemistry sample processing requiring reliable pellet recovery
Compatibility
With a standard 11 mm OD, these tubes fit the 1.5/1.8/2.0 mL rotor positions found on the most widely used benchtop microcentrifuges. Verified compatible platforms include the Eppendorf® Centrifuge 5415D, 5415R, 5424, 5424R, and MiniSpin®; Thermo Fisher Sorvall™ Legend Micro 17 and 21 and Heraeus® Pico 17 and 21; VWR®/Avantor Galaxy 16DH and Galaxy 16 standard 24-position fixed-angle rotors; Labnet® Prism™ R Refrigerated Microcentrifuge (C2500-R) in all rotor configurations accepting the 1.5/2.0 mL format; and Sigma/Sartorius 1-15K, 1-16K, and 3-18KS microcentrifuges in both swing-bucket and fixed-angle configurations. Always verify your specific rotor's maximum OD tolerance before switching from OEM supply.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers and saline solutions | Excellent |
| Dilute acids and dilute bases | Excellent |
| Short-chain alcohols (ethanol, isopropanol) | Good — suitable for precipitation protocols |
| Many organic solvents (general) | Good — HDPE offers broad organic resistance |
| Chlorinated solvents (chloroform, DCM) | Use with caution — verify compatibility before extended contact |
| Aromatic solvents (toluene, xylene) | Not recommended for prolonged contact |
| Autoclave sterilization | Not recommended — HDPE is not autoclavable |
Quality & Procurement
Made in USA at Caplugs® Evergreen's California manufacturing facility, these tubes are molded from virgin HDPE resin under strict dimensional quality-control protocols that ensure lot-to-lot consistency in wall thickness and cap-thread tolerance. All pigmentation is compounded directly into the resin — there are no leachable surface coatings. The tubes are BPA-free and contain no phthalate plasticizers, meeting the material-safety requirements of clinical and regulated research environments. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with tiered pricing available for institutional, hospital, and grant-funded procurement accounts.
Frequently Asked Questions
Are these microcentrifuge tubes sterile?
No — the 214-3739-020 tubes are supplied non-sterile in bulk 1,000/Bag packaging. For applications requiring sterility, consider gamma-irradiated alternatives or in-house sterilization methods compatible with HDPE (note that HDPE is not autoclavable).
What is the tube OD, and will these fit standard microcentrifuge rotors?
The tubes have a standard 11 mm outer diameter, which seats correctly in the 1.5/1.8/2.0 mL rotor positions of most benchtop microcentrifuges from Eppendorf, Thermo Fisher, VWR/Avantor, Labnet, and Sigma/Sartorius. Always confirm your specific rotor's OD specification before switching from OEM supply.
Why choose HDPE over polypropylene for microcentrifuge tubes?
HDPE offers excellent resistance to a broad range of aqueous reagents, dilute acids and bases, and many organic solvents, making it well suited for general sample storage and processing workflows. Polypropylene is preferred when autoclave sterilization is required, since HDPE is not autoclavable. Both materials are BPA-free and low in extractables.
Does the natural color allow visual inspection of the sample?
Yes — the semi-opaque natural finish of HDPE allows technicians to visually monitor sample levels, pellet formation, and phase separation without opening the tube, which is particularly useful during centrifugation and precipitation workflows.