50 mL Conical Centrifuge Tubes, Threaded Cap — PPC, Green, 1000/Bag (240-3937-G80)
These 50 mL conical-bottom centrifuge tubes are molded from Polypropylene Copolymer (PPC) and feature a threaded, leak-resistant cap that delivers a secure seal during centrifugation, sample storage, and transport. Supplied non-sterile in sealed 1000/Bag packaging, part number 240-3937-G80 is manufactured at Caplugs® Evergreen ISO-certified facilities using virgin-grade, FDA-registered resin. The conical bottom geometry concentrates cell pellets and precipitates at the tube tip for complete, low-dead-volume recovery after centrifugation.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-3937-G80 |
| Volume | 50 mL |
| Bottom Style | Conical |
| Cap Style | Threaded — leak-resistant seal |
| Material | Polypropylene Copolymer (PPC) |
| Color | Green |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Cell culture harvesting — conical pellet geometry ensures complete cell recovery with minimal residual volume
- Serum and plasma separation — threaded closure prevents leaks during centrifugation and subsequent refrigerated storage
- Protein precipitation and density gradient centrifugation — conical tip concentrates precipitates and density-separated fractions for easy aspiration
- Clinical specimen processing and transport — secure threaded cap resists evaporation and contamination in CAP/CLIA-regulated workflows
- Reagent preparation and sample storage — large 50 mL capacity accommodates bulk reagent aliquoting and intermediate sample holds
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids | Excellent |
| Dilute bases | Excellent |
| Methanol | Good |
| Isopropanol | Good |
| Acetonitrile | Good |
| Aromatic / chlorinated solvents | Limited — not recommended for prolonged contact |
Quality & Procurement
Made in USA, these Caplugs® Evergreen conical tubes are produced under ISO-certified quality management from virgin-grade, FDA-registered PPC resin that is BPA-free and phthalate-free. Lot-to-lot dimensional consistency ensures reliable fit in standard centrifuge rotor positions, and sealed 1000/Bag packaging maintains product integrity from warehouse receipt through point of use. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with tiered pricing available for high-volume institutional and grant-funded laboratories.
Frequently Asked Questions
Are these centrifuge tubes sterile?
No — they are supplied non-sterile in 1000/Bag packaging. For workflows requiring sterility, downstream sterilization or a sterile-format alternative should be considered.
Will the threaded cap hold under centrifugal force?
Yes. The threaded closure is designed to provide a leak-resistant seal during centrifugation, making it more reliable under centrifugal force than snap-cap formats and suitable for sample transport applications as well.
Is PPC autoclavable?
Polypropylene Copolymer shares the general autoclavability characteristics of polypropylene; however, Caplugs® Evergreen does not certify these specific tubes for autoclave use, so verify your sterilization protocol against the manufacturer's guidance before autoclaving.
What is the difference between PPC and standard PP for centrifuge tubes?
Polypropylene Copolymer (PPC) incorporates a co-monomer that improves impact resistance and low-temperature flexibility compared to standard homopolymer PP, reducing the risk of cracking during centrifugation or cold-storage handling while retaining excellent chemical resistance to aqueous buffers, dilute acids and bases, and common alcohols.