50 mL Centrifuge Tubes, Screw Caps, PPC, Green — 222-3549-G8D | 20/Tray | Caplugs® Evergreen

Quick Reference

Technical Narrative

The Caplugs® Evergreen 222-3549-G8D is a 50 mL Sterile PPC Freestanding Centrifuge Tube with Green cap, 20/Tray Assembled. The 50 mL freestanding PPC tube is the sterile equivalent of the standard 50 mL polypropylene centrifuge tube — the workhorse of the cell biology and clinical lab — providing the maximum standard centrifuge tube volume in a sterile, freestanding PPC format. The 20/Tray Assembled format provides pre-assembled tubes in an open sterile rack tray for direct BSC pick-and-use.

Polypropylene Copolymer (PPC): full methanol and organic solvent compatibility, improved cold-temperature flexibility versus PS, optical clarity for pellet and gradient monitoring. BPA-free, phthalate-free, FDA-compliant,

Procurement economics: $527.74/Tray (20/Tray), $26.3869/tube. Siblings: 222-3550-G80 (50 mL PPC Green Cap 10/Bag Unassembled); 222-3529-G8D (30 mL PPC Green Cap 20/Tray Assembled). LabSupplies.com ships from USA inventory, typically same business day.

Technical Specifications

50 mL Sterile PPC Freestanding Centrifuge Tube Applications

The is compatible with the following sterile workflows.

Chemical Resistance — Polypropylene Copolymer (PPC)

Compatibility reference for PPC at typical laboratory conditions.

Clinical & Research Laboratory Applications

Caplugs® Evergreen 50 mL sterile PPC freestanding centrifuge tubes with green caps serve cell therapy, immunology, and clinical laboratories as the sterile large-volume centrifuge tube standard. The 50 mL freestanding PPC tube is the sterile, PPC-material equivalent of the universal 50 mL polypropylene conical — used for PBMC isolation by Ficoll density gradient centrifugation, large-volume T-cell and CAR-T expansion harvest, GMP cell washing and concentration, and any sterile 50 mL centrifugation step where PPC's material properties (cold-temperature flexibility, methanol compatibility) are specified over standard PP or PS. The 20/Tray Assembled format provides pre-assembled tubes in an open sterile tray — the preferred GMP format for cell therapy batch record documentation where assembly steps must be minimized and documented.

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?

Yes. Sterile — tray sterile-packed as specified.

What is the difference between 20/Tray Assembled and 10/Bag Unassembled (222-3550-G80)?

20/Tray Assembled: tubes pre-assembled with green caps in open sterile tray — direct BSC pick-and-use, no assembly, preferred for GMP cell therapy and high-throughput BSC workflows. Higher per-tube cost. 10/Bag Unassembled: tube and cap in same bag, assembled at bench — lower per-tube cost for standard research labs.

How does the sterile 50 mL PPC tube differ from a standard PP 50 mL conical?

The 222-3549/3550 series differs in three key ways: (1) Sterile — required for direct cell culture contact and GMP cell therapy; standard PP 50 mL conicals are typically non-sterile. (2) PPC material — improved cold-temperature flexibility and full methanol compatibility vs standard PP. (3) Freestanding base — stands without a rack in the BSC. Standard 50 mL conicals require a rack or holder for upright use.