30 mL Freestanding Polypropylene Centrifuge Tubes with Spork Red Caps — 240-3534-R30
These 30 mL freestanding polypropylene centrifuge tubes feature an integrated spork cap in red and are supplied 1000/Bag unassembled for compact storage and efficient distribution. The flat-bottom freestanding base eliminates the need for a rack during bench-top processing, and molded-in graduations every 5 mL provide quick, reliable volume reads without additional measuring steps. Rated to 10,000 × g, these tubes are well suited to clinical, diagnostic, and research workflows that demand a large-format, chemically resistant centrifuge tube.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-3534-R30 |
| Volume | 30 mL |
| Maximum RCF | 10,000 × g |
| Graduations | Every 5 mL |
| Cap Color | Red |
| Spork Cap | Yes — integrated |
| Tube Body Color | Natural (clear) |
| Material | Polypropylene (PP) |
| Base Style | Freestanding Flat Bottom |
| Sterility | Non-Sterile |
| Format | Unassembled |
| Pack Size | 1000/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Fecal and stool specimen collection — the integrated spork cap supports direct collection without a separate tool
- Clinical chemistry and molecular diagnostics requiring large-volume sample processing
- Nucleic acid (DNA/RNA) extraction workflows where polypropylene chemical resistance is essential
- Cell culture harvest, protein purification, and pelleting at up to 10,000 × g
- Microbiology and environmental laboratory sample preparation
- Color-coded tube management systems — red caps enable visual lot and sample-type differentiation at a glance
- CAP-, CLIA-, and ISO 15189-compliant laboratories requiring lot-numbered, traceable consumables
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers and saline | Excellent |
| Dilute acids and bases | Excellent |
| Ethanol and isopropanol | Good — short-term contact |
| Acetone and ketones | Limited — short-term contact only |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
| Aromatic solvents (toluene, xylene) | Not recommended |
| Autoclave sterilization | Polypropylene is autoclavable; verify tube closure integrity before autoclaving |
Quality & Procurement
Made in USA, these Caplugs® Evergreen centrifuge tubes are manufactured from BPA-free, phthalate-free polypropylene and are lot-numbered to support traceability requirements in CAP-, CLIA-, and ISO 15189-accredited laboratories. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory, with tiered volume pricing available for institutional purchasing teams, hospital systems, and grant-funded research programs.
Frequently Asked Questions
What is the spork cap, and which workflows use it?
The spork is a small integrated collection tool molded into the red cap of each tube, designed specifically for fecal and stool specimen collection. It allows direct sampling without a separate collection implement, streamlining workflow in clinical microbiology and parasitology settings.
Do these tubes require a rack for bench-top use?
No. The flat-bottom freestanding base allows the tubes to stand upright on any flat bench surface without a separate rack, which simplifies staging, aliquoting, and short-term storage during active workflows.
Are these centrifuge tubes sterile?
These tubes are supplied non-sterile. For applications requiring sterility — such as cell culture or certain molecular assays — laboratories should apply their standard decontamination or sterile-technique protocols as appropriate.
What does "unassembled" mean for the 1000/Bag format?
Unassembled means the caps and tubes are packaged separately within the bag rather than pre-attached. This reduces the bag footprint for storage and shipping, and many labs attach caps at point of use as part of their labeling and preparation workflow.