Caplugs® Evergreen 50 mL Conical Centrifuge Tubes, Sterile PPC, Natural Body with Green Screw Caps — 20/Tray Assembled (480/Pack)
The Caplugs® Evergreen 50 mL Conical Centrifuge Tubes deliver a sterile, ready-to-use solution for sample preparation, cell pelleting, and reagent storage. Molded from polypropylene copolymer (PPC) with a natural translucent body and color-coded green screw caps, each tube ships assembled in convenient 20-position trays for fast bench access.
Technical Specifications
| Product Type | Conical Centrifuge Tubes |
| Volume/Size | 50 mL |
| Material | Polypropylene Copolymer (PPC), natural body |
| Closure/Cap | Green screw cap, assembled |
| Graduation | Molded graduations with marking spot |
| Sterility | Sterile |
| Pack Size | 480/Pack (20/Tray Assembled) |
| Country of Origin | USA |
Applications
- Mammalian cell harvesting and pelleting during centrifugation
- Bulk reagent, buffer, and media aliquoting and storage
- Sample collection and transport for clinical and research workflows
- Protein and nucleic acid precipitation protocols
- Tissue homogenate processing prior to extraction
- Long-term frozen sample archiving at low temperatures
Chemical Resistance
| Reagent Class | Compatibility (PPC) |
| Dilute acids | Good to excellent |
| Dilute bases / alkalis | Excellent |
| Alcohols (ethanol, isopropanol) | Excellent |
| Aqueous salt solutions and buffers | Excellent |
| Aldehydes (formaldehyde) | Good |
| Chlorinated and aromatic solvents | Poor — avoid prolonged contact |
Quality & Procurement
labsupplies.com is an authorized Caplugs® Evergreen dealer shipping from US inventory, and these tubes are Made in USA. Each bag and case carries lot numbers to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact our procurement team for volume quotes.
Frequently Asked Questions
What maximum centrifugation force do these tubes withstand?
PPC 50 mL conical tubes are designed for moderate-speed spins typical of cell pelleting and clarification. Always confirm your rotor's rated g-force and use a properly fitted adapter; do not exceed the tube manufacturer's stated RCF limit.
Are these tubes supplied sterile?
Yes. Each tube is sterile and ready to use directly from the tray, making them suitable for cell culture and clinical sample handling without additional preparation.
What does "20/Tray Assembled" mean for this pack?
Tubes arrive pre-assembled with their green screw caps and organized in 20-position trays for stable, upright bench access. The full pack contains 480 tubes.
Can these tubes be frozen for sample archiving?
Yes. Polypropylene copolymer performs well at low storage temperatures. Allow headspace for liquid expansion and bring tubes to a stable temperature before handling to reduce stress cracking.