30–50 mL Centrifuge Tubes, Screw Caps, PPC, Natural — 220-3550-080 | 200/Bag | Caplugs® Evergreen

Quick Reference

Technical Narrative

The Caplugs® Evergreen 220-3550-080 is a 50 mL Freestanding Centrifuge Tube in PPC (Natural), packaged 200/Bag. The 50 mL freestanding tube is the largest standard centrifuge tube format, used for high-volume cell culture harvest, bulk reagent and buffer preparation at the 30–50 mL scale, large-volume SPE eluate collection, and density gradient protocols requiring maximum tube capacity. The freestanding base supports upright tube handling for the entire sample prep workflow without a rack.

Polypropylene Copolymer (PPC): PPC adds improved optical clarity over homopolymer PP for direct visual inspection through the tube wall and better cold-temperature flexibility — suited to visual monitoring, cold-room centrifugation, and workflows requiring the clarity advantage alongside broad organic solvent compatibility. BPA-free, phthalate-free, FDA-compliant,

Procurement economics: $187.58/Bag, $0.9379/tube at 200/Bag. Volume pricing at 10+ bags. LabSupplies.com ships from USA inventory, typically same business day.

Technical Specifications

50 mL PPC Freestanding Centrifuge Tube Applications

The is compatible with the following large-volume centrifuge and lab prep workflows.

Chemical Resistance — Polypropylene Copolymer (PPC)

Compatibility reference for PPC at typical laboratory concentrations.

Clinical & Research Laboratory Applications

Caplugs® Evergreen 50 mL PPC freestanding centrifuge tubes serve cell biology, bioproduction, and bulk analytical laboratories requiring the maximum standard centrifuge tube format. The 50 mL freestanding tube is the standard for high-volume suspension culture harvest (30–50 mL), bulk buffer and reagent preparation for extended analytical runs, large-volume SPE eluate collection, and density gradient protocols requiring maximum volume capacity. PPC's optical clarity allows visual monitoring of gradient interface definition and pellet formation through the tube wall during centrifugation, and PPC's cold-temperature flexibility supports cold-room centrifugation at 4°C.

U.S. Manufacturing, Quality & Institutional Procurement

Caplugs® Evergreen products are manufactured in the United States under ISO 9001 quality management from FDA-compliant, food-contact-grade resins. BPA-free, phthalate-free, and latex-free, with material-disclosure documentation supporting CAP, CLIA, and ISO 15189 laboratory accreditation audits.

LabSupplies.com is an authorized dealer for the full Caplugs Evergreen catalog and ships directly from USA inventory — typically same business day for stocking SKUs. We offer below retail pricing on volume orders, tiered institutional and academic pricing, and direct support for grant-funded laboratories and government procurement channels. Lab managers and procurement officers can request a written quote or speak with a product specialist directly from our sales engineering team.

Frequently Asked Questions

Are the tubes sterile?

No. The ships Non-Sterile. For sterility-critical applications, use aseptic technique or ask about gamma-sterilized options.

What is the maximum centrifuge speed for the 50 mL freestanding tube?

Freestanding centrifuge tubes in the 50 mL format are suitable for bench centrifuges with appropriate rotor adapters up to approximately 3000×g for standard cell pelleting and density gradient protocols. For speeds above 3000×g, verify that the specific rotor and adapter are rated for the tube format. Do not use freestanding tubes in rotors designed only for standard-base conical tubes without confirming adapter compatibility.

What cap is compatible with the 50 mL PPC freestanding centrifuge tube?

The ships without a cap. Use a compatible screw cap matching the tube neck diameter. For centrifugation, ensure the cap is rated for the rotor speed and that the tube-cap assembly clears the rotor lid. Contact us for cap compatibility guidance if needed.