50 mL Freestanding Centrifuge Tubes, Polypropylene Copolymer, Blue Cap — 240-3550-B80 | 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 a bulk 1000/Bag unassembled format for high-volume laboratory procurement. A flat-bottom freestanding base eliminates the need for a tube rack during benchtop processing, and molded-in graduations at every 5 mL provide reliable volume reference during sample preparation and aliquoting. The blue cap enables color-coded tube identification and supports multi-category batch management in clinical, research, and diagnostic settings.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-3550-B80 |
| Volume | 50 mL |
| Maximum Centrifuge Capacity | 10,000 × g |
| Graduations | Molded-in, every 5 mL |
| Material | Polypropylene Copolymer (PPC) |
| Base Style | Freestanding Flat Bottom |
| Cap Color | Blue |
| Tube Body Color | Natural |
| Sterility | Non-Sterile |
| Format | Unassembled |
| Pack Size | 1000/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Large-volume centrifugation in clinical chemistry, molecular diagnostics, and microbiology workflows requiring up to 10,000 × g
- Nucleic acid extraction (DNA/RNA) where chemical resistance to alcohols and common extraction reagents is essential
- Cell culture, protein purification, and reagent preparation requiring a stable 50 mL vessel
- Freestanding benchtop specimen staging, aliquoting, and short-term storage without external rack infrastructure
- Color-coded sample batch management using cap color to distinguish specimen categories or processing runs
- CAP-, CLIA-, and ISO 15189-compliant workflows supported by lot-numbered, traceable consumables
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline / water | Excellent |
| Dilute acids and bases | Excellent |
| Alcohols (ethanol, isopropanol) | Good — suitable for extraction protocols |
| Ketones (acetone) | Good — short-term contact; verify for extended exposure |
| Chlorinated solvents (chloroform, DCM) | Limited — not recommended for prolonged contact |
| Aromatic solvents (toluene, xylene) | Not recommended |
| Autoclave / steam sterilization | Compatible (polypropylene base resin) |
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. The unassembled 1000/Bag format reduces packaging footprint and per-unit cost, making it an efficient choice for high-throughput facilities with consistent 50 mL tube demand. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with institutional and volume pricing available for clinical labs, research institutions, and biotech procurement teams.
Frequently Asked Questions
Are these centrifuge tubes sterile?
No — part number 240-3550-B80 is supplied non-sterile. For workflows requiring sterile 50 mL tubes, a sterile-certified product should be selected instead.
What does "unassembled" mean for this product?
Unassembled means the blue caps and tube bodies are packaged separately within the bag and are not pre-attached at the time of shipment. This format reduces shipping volume and allows labs to cap tubes at the point of use.
Do these tubes require a rack to stand upright?
No — the flat-bottom freestanding base allows the tubes to stand independently on any level benchtop surface, eliminating the need for a tube rack during centrifuge staging, aliquoting, or storage.
What is the significance of the blue cap color?
Blue caps allow for visual color-coding in multi-tube laboratory workflows, making it straightforward to distinguish specimen categories, processing batches, or reagent types at a glance without additional labeling.