50 mL Freestanding Centrifuge Tubes, Polypropylene Copolymer, Red Cap — 240-3550-R80 | 1000/Bag
These 50 mL freestanding centrifuge tubes from Caplugs® Evergreen are constructed from Polypropylene Copolymer (PPC) and supplied non-sterile, unassembled, 1000/Bag for high-volume laboratory procurement. Rated to 10,000 × g, they support demanding centrifugation workflows in clinical, research, and diagnostic settings. The red screw cap enables immediate color-coded tube identification, while the freestanding flat-bottom base allows stable bench-top placement without a rack.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-3550-R80 |
| Tube Type | Freestanding Centrifuge Tube |
| Volume | 50 mL |
| Maximum RCF | 10,000 × g |
| Graduations | Molded-in, every 5 mL |
| Material | Polypropylene Copolymer (PPC) |
| Cap Color | Red |
| Tube Body Color | Natural (clear) |
| Base Style | Freestanding Flat Bottom |
| Sterility | Non-Sterile |
| Format | Unassembled |
| Pack Size | 1000/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- High-speed centrifugation up to 10,000 × g in clinical chemistry, molecular diagnostics, and microbiology workflows
- Nucleic acid (DNA/RNA) extraction requiring a chemically resistant, large-volume tube
- Cell culture harvesting, protein purification, and biological sample concentration
- Large-volume specimen collection, aliquoting, and storage where freestanding stability eliminates the need for a separate rack
- Color-coded batch and priority management in multi-cap-color laboratory systems — red caps designate specific sample categories at a glance
- Environmental and industrial lab sample processing requiring a 50 mL format
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers and saline | Excellent |
| Dilute acids and bases | Excellent |
| Alcohols (ethanol, isopropanol) | Good — short-term contact |
| Ketones (acetone) | Limited — short-term contact only |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
| Aromatic solvents (toluene, xylene) | Not recommended |
| Autoclave sterilization | Not applicable — supplied non-sterile; confirm suitability before autoclaving |
Quality & Procurement
Made in USA, these Caplugs® Evergreen centrifuge tubes are manufactured from BPA-free, phthalate-free Polypropylene Copolymer resin and are lot-numbered to support traceability requirements in CAP-, CLIA-, and ISO 15189-accredited laboratories. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory, with tiered volume pricing available for institutional, hospital, and grant-funded accounts. The unassembled 1000/Bag format maximizes storage efficiency and minimizes per-unit cost for high-throughput facilities.
Frequently Asked Questions
Are these centrifuge tubes sterile?
No — part number 240-3550-R80 is supplied non-sterile and unassembled. For workflows requiring sterility, confirm whether your process includes a downstream sterilization step, or contact us about sterile alternatives.
What centrifuge speed can these tubes handle?
These tubes are rated for centrifugation up to 10,000 × g. Always confirm that your specific rotor and centrifuge configuration does not exceed this RCF rating before use.
Do the tubes require a rack for storage or processing?
No — the freestanding flat-bottom base allows the tubes to stand upright on any level bench surface without a rack, simplifying staging, aliquoting, and short-term storage.
What does the red cap indicate?
The red cap is designed for color-coded laboratory management, allowing staff to instantly distinguish tube batches, sample types, or priority categories in multi-cap-color workflows. The natural (clear) tube body keeps sample contents visible regardless of cap color.