Caplugs® Evergreen
16 mL Test Tubes, Round Bottom, PPC, Natural — 222-2380-080 | 25/Bag | Caplugs® Evergreen
16 mL Test Tubes, Round Bottom, PPC, Natural — 222-2380-080 | 25/Bag | Caplugs® Evergreen
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Quick Reference
| Part Number | 222-2380-080 |
|---|---|
| Capacity | 16 mL |
| Dimensions | 17 × 100 mm |
| Material | Polypropylene Copolymer (PPC) |
| Color | Natural |
| Cap / Closure | None — open top; use separate cap or stopper |
| Key Advantage | PPC vs PS: improved cold-temperature flexibility; full methanol/organic solvent compatibility |
| Sterility | Sterile — individually or bag sterile-packed |
| Pack Size | 25/Bag |
| Origin | Made in USA |
| Price | $99.99/Bag ($3.9995/tube) |
Technical Narrative
The Caplugs® Evergreen 222-2380-080 is a 16 mL Round Bottom PPC Sterile Test Tube, 17 × 100 mm, sterile, packaged 25/Bag. The 16.0 mL 17×100 mm format serves roller tube culture, large-volume T-cell stimulation, and high-volume serology requiring PPC's material advantages at the 16 mL scale.
PPC offers two material advantages over PS in the round-bottom tube format: (1) improved cold-temperature flexibility — PPC tubes are less prone to micro-fracture when retrieved from —80°C frozen storage or dry-ice transport, supporting stain-and-freeze workflows in large longitudinal studies; (2) full methanol and organic solvent compatibility — PPC withstands prolonged methanol contact used in intracellular staining and nuclear fixation protocols where standard PS shows stress crazing. BPA-free, phthalate-free, FDA-compliant,
Procurement economics: $99.99/Bag, $3.9995/tube. Siblings: 222-2393-080 (16 mL PPC Snap Cap Unassembled 25/Bag); 222-2394-08I (16 mL PPC Snap Cap Individually Packed 500/Box); 222-2070-010 (16 mL PS Open Top 25/Bag). LabSupplies.com ships from USA inventory, typically same business day.
Technical Specifications
| Part Number | |
|---|---|
| Caplugs Item # | |
| Capacity | 16 mL |
| Dimensions | 17 × 100 mm |
| Geometry | Round bottom |
| Material | Polypropylene Copolymer (PPC) |
| Color | Natural |
| Cap | None (open top); use compatible stopper or cap |
| Key PPC Advantage | Cold-temp flexibility (—80°C); full methanol/organic solvent compatibility |
| Sterility | Sterile — individually or bag sterile-packed |
| Pack Size | 25/Bag |
| BPA / Phthalate | BPA-Free, Phthalate-Free, Latex-Free |
| Country of Origin | USA |
| Price | $99.99/Bag ($3.9995/tube) |
16 mL 17 × 100 mm Sterile PPC Round Bottom Tube Applications
The is compatible with the following laboratory workflows. PPC provides material advantages over PS where cold storage and methanol-based protocols are used.
| Application / Instrument | Configuration | Notes |
|---|---|---|
| Roller tube culture | Roller drum incubator, 17×100 mm format | PPC: methanol-compatible post-culture staining |
| Large-volume T-cell stimulation | Incubator, snap-cap vented | Snap cap vented for CO2; PPC cold-storage compatible |
| Intracellular staining (large) | Methanol fix-perm, 16 mL scale | PPC: full methanol compatibility where PS would craze |
| Flow cytometry prep (large) | Large staining volume, 16 mL tube | PPC: freeze samples at —80°C for batch analysis |
| Centrifugation | Clinical centrifuge, 17×100 mm adapter | Verify adapter; PPC withstands centrifuge forces |
| Cold storage post-staining | —80°C rack, 16 mL tubes | PPC: reduced brittle-fracture vs PS at cold retrieval |
| High-volume serology | Tube agglutination, 16 mL scale | PPC optical clarity for visual agglutination reading |
Chemical Resistance — Polypropylene Copolymer (PPC)
Compatibility reference for PPC — key advantages over PS highlighted.
| Reagent / Condition | Compatibility | Notes |
|---|---|---|
| Aqueous buffers / saline | Excellent | PPC inert across pH 2–12. |
| Serum / plasma / whole blood | Excellent | Standard biological matrix; low protein-binding. |
| Methanol (<100%) | Excellent | PPC: full methanol compatibility — key advantage over PS. |
| Acetonitrile (<100%) | Excellent | Full organic solvent compatibility. |
| Formalin (10% NBF) | Excellent | Compatible for cell fixation protocols. |
| Saponin / detergent buffers | Good | PPC compatible with standard permeabilization buffers. |
| Dichloromethane / chloroform | Not Compatible | Causes cracking; do not use. |
| Cold storage (—80°C) | Excellent | PPC: maintained flexibility at —80°C — key advantage over PS. |
Clinical & Research Laboratory Applications
Caplugs® Evergreen 16.0 mL 17×100 mm PPC sterile round-bottom tubes serve cell biology and immunology laboratories requiring the 16 mL roller tube format with PPC's material advantages over PS. PPC is specified for large-volume cell stimulation protocols where cells are cultured in the 16 mL tube then stained with intracellular markers using methanol-based permeabilization — a combined culture-then-stain workflow where the same tube is used for both steps, requiring PPC's full methanol compatibility. The two-position snap cap maintains vented culture conditions in the CO2 incubator and re-seals for transfer to the BSC for staining. The individually packed format (222-2394-08I) provides pre-assembled sterile tubes for GMP or cell therapy use; the unassembled format (222-2393-080) provides cost-effective bulk supply for standard labs.
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 test tubes sterile?
Yes. Sterile — individually or bag sterile-packed as specified.
What are the main advantages of PPC over PS for these round-bottom tubes?
Two key advantages: (1) Cold-temperature flexibility — PPC tubes are less prone to micro-fracture when retrieved from —80°C freezer storage or dry-ice transport, reducing tube breakage in stain-and-freeze workflows. (2) Methanol compatibility — PPC withstands full methanol contact without stress crazing, supporting intracellular cytokine staining and nuclear antigen protocols using methanol-based fix-perm reagents where PS may craze. Both PS and PPC provide similar optical clarity and flow cytometer compatibility.
Is the PPC 16 mL tube compatible with the same roller drums as the PS version?
Yes. PPC and PS 16 mL 17×100 mm tubes are dimensionally identical and compatible with the same roller drum formats. Select PPC when the protocol involves cold storage, intracellular staining with methanol-based fix-perm, or any workflow where PPC's material advantages are relevant.
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