15 mL Tube Racks, Screw Caps, PPC, Green, BD/Falcon Compatible — 222-2470-G8K | 25/Bag | Caplugs® Evergreen

Quick Reference

Technical Narrative

The Caplugs® Evergreen 222-2470-G8K is a 15 mL Sterile Conical Centrifuge Tube with Green Cap in PPC (Natural), 25/Bag Unassembled. The green cap is the industry-standard color convention for 15 mL conical tubes, established by the Falcon/BD format used across cell biology and clinical labs worldwide. The sterile specification distinguishes this tube from the non-sterile 220-series conicals — required when the tube will directly contact cells in culture, receive a sterile specimen, or feed a downstream sterile process. The 25/Bag Unassembled format provides tube and cap in the same bag for bench assembly before use — the cost-effective format for labs that assemble at point of use.

PPC provides improved cold-temperature flexibility vs PS — reducing brittle-fracture risk on retrieval from —80°C storage or dry-ice transport — and full methanol/organic solvent compatibility for protocols involving fixation, precipitation, or organic extraction in the conical tube. BPA-free, phthalate-free, FDA-compliant,

Procurement economics: $198.78/Bag (25/Bag), $7.9510/tube. Siblings: 222-2469-G80 (15 mL PPC Green Cap 50/Tray Assembled); 222-2448-G50 (15 mL PS Green Cap 50/Tray Assembled); 222-2449-G5K (15 mL PS Green Cap 25/Bag Unassembled). LabSupplies.com ships from USA inventory, typically same business day.

Technical Specifications

15 mL Sterile PPC Conical Centrifuge Tube (Green Cap) Applications

The is compatible with the following centrifuge platforms and sterile laboratory workflows.

Chemical Resistance — Polypropylene Copolymer (PPC)

Compatibility reference for PPC at typical laboratory conditions.

Clinical & Research Laboratory Applications

Caplugs® Evergreen 15 mL sterile PPC conical centrifuge tubes with green caps serve cell biology, immunology, clinical diagnostics, and cell therapy laboratories requiring sterile 15 mL conical tubes in the green-cap convention format. The sterile specification is required for direct cell culture contact — suspension culture harvest, lymphocyte isolation, PBMC culture, and T-cell expansion workflows where the conical tube is used as both the centrifuge vessel and the culture vessel. Clinical labs use sterile 15 mL conicals for primary specimen collection and processing — serum separation, urine concentration by centrifugation, and CSF cytospin preparation. The green cap color convention provides immediate visual tube identification in the BSC when 15 mL and 50 mL (blue cap) tubes are used simultaneously in the same workflow. PPC is specified for the same applications as PS where the added material properties are needed: staining-then-freezing at —80°C (PPC cold-temp flexibility), intracellular staining with methanol-based fix-perm (PPC methanol compatibility), and organic extraction steps in the conical tube.

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 conical tubes sterile?

Yes. Sterile — packed in sterile tray or sterile bag as specified.

Why do 15 mL conical tubes have green caps?

Green caps on 15 mL conical centrifuge tubes are an industry-standard color convention — established by Falcon/BD and adopted across the laboratory plastics industry — to allow immediate visual identification of 15 mL tubes versus 50 mL tubes (which use blue caps) when both sizes are used simultaneously in a cell culture or serology workflow.

When should I choose PPC (222-2469/2470) over PS (222-2448/2449) for sterile 15 mL conicals?

Choose PPC when: (1) stained cell samples will be stored at —80°C before analysis — PPC's cold-temperature flexibility reduces micro-fracture risk vs PS on frozen tube retrieval; (2) intracellular staining protocols use methanol-based fix-perm reagents — PPC withstands full methanol contact where PS may show stress crazing; (3) organic extraction or precipitation in the tube requires broader solvent compatibility. Choose PS for standard room-temperature cell culture and centrifugation protocols where optical clarity is the priority.