4.5 mL Conical Bottom Centrifuge Tubes — Polypropylene, Blue, 12 × 75 mm (214-2355-B30) | 250/Bag
These 4.5 mL conical bottom centrifuge tubes measure 12 × 75 mm and are molded from virgin-grade polypropylene (PP) for reliable performance across clinical and research centrifugation workflows. Supplied non-sterile in sealed 250/Bag packaging, they are well suited for hematology, toxicology sample preparation, urinalysis sediment analysis, and any application requiring efficient pellet concentration at the tube tip. The blue color provides at-a-glance rack identification in high-throughput laboratory settings.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 214-2355-B30 |
| Volume | 4.5 mL |
| Dimensions | 12 × 75 mm |
| Bottom Style | Conical |
| Material | Polypropylene (PP) |
| Color | Blue |
| Sterility | Non-Sterile |
| Pack Size | 250/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Clinical hematology: differential cell counts and conical pellet concentration after centrifugation
- Toxicology sample preparation: clean phase separation with minimal carry-over
- Urinalysis: sediment analysis using conical bottom geometry to concentrate cellular and particulate material
- General centrifuge pelleting: complete aspirate recovery with minimal pellet disturbance
- Color-coded sample rack organization in high-throughput clinical and CAP/CLIA/ISO 15189-accredited laboratory workflows
Compatibility
The 12 × 75 mm outer diameter of these tubes is compatible with standard 12 mm clinical centrifuge tube holders, making them a practical choice for laboratories already using this format. Lot-to-lot dimensional consistency—including controlled wall thickness, outer diameter, and length tolerances—ensures a reliable fit across centrifuge rotors and tube racks designed for the 12 mm format. Every bag ships with a lot number and manufacturing date to support full traceability in CAP-, CLIA-, and ISO 15189-accredited 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, these Caplugs® Evergreen tubes are produced at ISO-certified facilities from FDA-compliant, virgin-grade polypropylene that is BPA-free, phthalate-free, and latex-free. Sealed 250/Bag packaging preserves product integrity from warehouse receipt through point of use, and each bag carries full lot and manufacturing date information for regulatory traceability. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from domestic USA inventory, with tiered volume pricing available for high-use clinical labs, hospitals, and research institutions.
Frequently Asked Questions
Are these centrifuge tubes sterile?
No — they are supplied non-sterile. For applications requiring sterility, confirm that your workflow includes a validated sterilization step or contact us about sterile packaging options.
What centrifuge rotor formats accept the 12 × 75 mm tube size?
The 12 × 75 mm outer diameter is compatible with standard 12 mm clinical centrifuge tube holders. Always verify rotor and tube holder specifications against your instrument's documentation before use.
Are these tubes safe for direct contact with serum, plasma, and urine?
Yes — they are molded from virgin-grade, FDA-compliant polypropylene that is BPA-free and phthalate-free, making them suitable for direct contact with serum, plasma, urine, and standard aqueous clinical reagent matrices.
Can these tubes be autoclaved?
Polypropylene is generally autoclavable; however, these tubes are supplied non-sterile and are not validated for autoclave sterilization by the manufacturer. Consult your laboratory's SOP before autoclaving.