50 mL Freestanding Centrifuge Tubes, Polypropylene Copolymer, Green Caps — 240-3550-G80 | 1000/Bag
These 50 mL freestanding centrifuge tubes from Caplugs® Evergreen are constructed from Polypropylene Copolymer (PPC), rated to 10,000 × g, and supplied non-sterile in unassembled 1000/Bag format for efficient bulk stocking. A flat-bottom freestanding base eliminates the need for a rack during bench-top staging, aliquoting, or storage, while molded-in graduations at every 5 mL deliver quick, reliable volume measurement without a separate measuring device. The green cap provides a recognizable visual cue for color-coded sample management across clinical, molecular, and research workflows.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-3550-G80 |
| Product Type | Freestanding Centrifuge Tube |
| Volume | 50 mL |
| Maximum RCF | 10,000 × g |
| Graduations | Molded-in, every 5 mL |
| Material | Polypropylene Copolymer (PPC) |
| Base Style | Freestanding Flat Bottom |
| Cap Color | Green |
| Tube Body Color | Natural |
| Sterility | Non-Sterile |
| BPA / Phthalate Free | Yes |
| Pack Size | 1000/Bag |
| Format | Unassembled |
| Country of Origin | USA |
Applications
- High-speed centrifugation at up to 10,000 × g in clinical chemistry, molecular diagnostics, and microbiology labs
- Nucleic acid (DNA/RNA) extraction and purification requiring large-volume, chemically resistant tubes
- Cell culture harvesting and protein purification workflows that utilize the full 50 mL capacity
- Specimen processing, aliquoting, and bench-top staging — freestanding base allows placement without a rack
- Color-coded batch management using green caps to distinguish sample groups, panel types, or collection additives
- Environmental laboratory and research applications requiring lot-traceable, BPA-free consumables
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids and bases | Excellent |
| Alcohols (ethanol, isopropanol) | Good — short-term contact |
| Ketones (acetone) | Limited — short-term only; not recommended for prolonged exposure |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
| Aromatic solvents (toluene, xylene) | Not recommended |
Quality & Procurement
Made in USA, these Caplugs® Evergreen centrifuge tubes are manufactured from BPA-free, phthalate-free Polypropylene Copolymer resin with lot numbering to support traceability requirements in CAP-, CLIA-, and ISO 15189-accredited laboratories. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with tiered pricing available for high-volume institutional, hospital, and grant-funded purchasing programs.
Frequently Asked Questions
Are these centrifuge tubes sterile?
No — part number 240-3550-G80 is supplied non-sterile. For workflows requiring sterile tubes, please contact us about sterile centrifuge tube options.
What does "unassembled" mean for this product?
The tubes and green caps are packed separately within the bag rather than pre-assembled. This reduces shipping volume and storage footprint; assembly takes only seconds at the bench before use.
What is the significance of the green cap color?
Green caps allow laboratories to implement a color-coded tube identification system, commonly used to distinguish sample types, collection additives, or research batch groups at a glance — reducing handling errors during high-throughput processing.
Can these tubes be autoclaved?
Polypropylene Copolymer has good thermal stability and is generally autoclavable; however, these tubes are supplied non-sterile and intended for single use. Verify your specific autoclave cycle parameters and consult your laboratory's SOP before autoclaving any consumable not labeled as autoclave-validated.