30 mL Freestanding Centrifuge Tubes with Spork Cap, PP, White — Caplugs® Evergreen (240-3534-W30)
These 30 mL polypropylene centrifuge tubes feature a freestanding flat-bottom base, molded-in 5 mL graduations, and an integrated spork cap — supplied non-sterile, unassembled, in a 1000/Bag format for high-volume clinical and research workflows. Rated up to 10,000 × g, they are suited for demanding centrifugation applications ranging from nucleic acid extraction to fecal specimen collection. The white cap enables color-coded tube identification and simplifies batch management across multi-cap-color laboratory systems.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-3534-W30 |
| Volume | 30 mL |
| Maximum RCF | 10,000 × g |
| Graduations | Molded-in, every 5 mL |
| Base Style | Freestanding Flat Bottom |
| Cap Color | White |
| Spork Cap | Yes — integrated |
| Tube Body Color | Natural (clear) |
| Material | Polypropylene (PP) |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag, Unassembled |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Fecal and stool specimen collection — the integrated spork cap is purpose-built for this workflow, eliminating the need for a separate collection device
- High-speed centrifugation in clinical chemistry, molecular diagnostics, and microbiology labs (up to 10,000 × g)
- Nucleic acid extraction: DNA and RNA isolation protocols requiring a chemically resistant 30 mL polypropylene tube
- Protein purification and cell culture applications where a larger tube volume is required
- Bench-top sample preparation, aliquoting, and storage — the freestanding base eliminates the need for a rack during staging and processing
- Color-coded multi-tube batch management using white caps alongside other cap colors in the Caplugs® Evergreen line
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers and saline | Excellent |
| Dilute acids and bases | Excellent |
| Alcohols (ethanol, isopropanol) | Good — short-term contact |
| Ketones (acetone) | Limited — brief contact only |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
| Aromatic solvents (toluene, xylene) | Not recommended |
| Autoclave sterilization | Compatible (PP is autoclavable; confirm with your autoclave protocol) |
Quality & Procurement
Made in USA, these Caplugs® Evergreen centrifuge tubes are manufactured from BPA-free, phthalate-free polypropylene and are. The unassembled 1000/Bag format maximizes storage efficiency and reduces per-unit cost for high-throughput facilities. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory. Part number 240-3534-W30 is a stocking item suitable for blanket orders and standing purchase agreements.
Frequently Asked Questions
Are these centrifuge tubes sterile?
No — they are supplied non-sterile. For workflows that require sterility (e.g., cell culture or certain clinical assays), additional sterilization steps would need to be performed by the end user, or a sterile variant should be sourced.
What is the purpose of the integrated spork cap?
The spork is a built-in collection tool molded directly into the white cap, making these tubes well suited for fecal and stool specimen collection. It eliminates the need for a separate collection spoon or device, streamlining kit assembly and reducing components for clinical and reference labs.
Do the tubes require a rack to stand upright?
No. The freestanding flat-bottom base allows the tubes to stand independently on the benchtop, in a centrifuge rotor staging area, or in storage — without any external rack infrastructure.
What graduation increments are molded into the tube?
The tubes have molded-in graduation marks at every 5 mL, allowing technicians to read approximate volumes quickly during sample preparation and aliquoting without a separate measuring device.
