4.5 mL Conical Bottom Centrifuge Tubes, Polypropylene, Red — 250/Bag (214-2355-R30)
These 4.5 mL conical bottom tubes measure 12 × 75 mm and are molded from virgin-grade polypropylene (PP), making them well suited for clinical centrifugation, urinalysis sediment concentration, and toxicology sample preparation. Supplied non-sterile in sealed 250/Bag packaging, the red color provides immediate rack-position identification in high-throughput laboratory workflows. Lot-to-lot dimensional consistency ensures reliable fit in standard 12 mm centrifuge tube holders, batch after batch.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 214-2355-R30 |
| Volume | 4.5 mL |
| Dimensions | 12 × 75 mm |
| Bottom Style | Conical |
| Material | Polypropylene (PP) |
| Color | Red |
| Sterility | Non-Sterile |
| Pack Size | 250/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Clinical hematology — differential cell counts and pellet concentration using the conical geometry to minimize pellet disturbance during aspiration
- Urinalysis sediment analysis — conical bottom consolidates cellular and particulate sediment at the tube tip for efficient microscopic examination
- Toxicology sample preparation — clean phase separation in aqueous and dilute-reagent matrices
- General centrifuge pelleting — compatible with standard 12 mm clinical centrifuge tube holders
- Color-coded rack organization — red coloring supports visual sample-type or workflow-stage identification in high-throughput settings
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids | Excellent |
| Dilute bases | Excellent |
| Methanol | Good |
| Isopropanol | Good |
| Acetonitrile | Good |
| Aromatic / chlorinated solvents | Not recommended |
Quality & Procurement
Made in USA from FDA-compliant, BPA-free, phthalate-free virgin-grade polypropylene, these tubes are produced at Caplugs® Evergreen ISO-certified manufacturing facilities with tight controls on wall thickness, outer diameter, and length tolerance. Each bag carries a lot number and manufacturing date to support full traceability under CAP, CLIA, and ISO 15189 quality programs. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, so labs avoid offshore lead-time variability and can depend on consistent domestic supply for high-volume clinical operations.
Frequently Asked Questions
Are these tubes sterile?
No — the 214-2355-R30 tubes are supplied non-sterile. For applications requiring sterility, contact us about sterile alternatives in the Caplugs® Evergreen catalog.
Will these tubes fit standard clinical centrifuge racks?
Yes. The 12 × 75 mm outer dimensions are compatible with standard 12 mm clinical centrifuge tube holders commonly found in hematology and urinalysis workflows.
Are the tubes safe for direct contact with serum, plasma, and urine?
Yes. They are molded from virgin-grade polypropylene resin that is BPA-free and phthalate-free, making them appropriate for direct contact with serum, plasma, urine, and standard aqueous clinical matrices.
What lot traceability documentation is available?
Each bag is labeled with a lot number and manufacturing date, providing the documentation needed for CAP, CLIA, and ISO 15189 accreditation recordkeeping.