30 mL Freestanding Polypropylene Centrifuge Tubes with Black Spork Caps — 240-3534-Z30
These 30 mL freestanding centrifuge tubes from Caplugs® Evergreen are constructed from polypropylene and rated to 10,000 × g, making them suitable for demanding centrifugation workflows across clinical, research, and environmental laboratories. Each tube features a freestanding flat-bottom base for rack-free bench placement, molded-in graduations every 5 mL for accurate volume measurement, and a black screw cap with an integrated spork for fecal and stool specimen collection. Supplied non-sterile and unassembled in a 1000/Bag format, part number 240-3534-Z30 is optimized for high-volume procurement and compact storage.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-3534-Z30 |
| Volume | 30 mL |
| Maximum RCF | 10,000 × g |
| Graduations | Molded-in every 5 mL |
| Material | Polypropylene (PP) |
| Tube Body Color | Natural (clear) |
| Cap Color | Black |
| Cap Feature | Integrated spork |
| Base | 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 using the integrated spork cap — a single vessel handles collection, capping, and centrifugation
- High-speed centrifugation up to 10,000 × g for clinical chemistry, molecular diagnostics, and protein purification workflows
- Nucleic acid (DNA/RNA) extraction requiring chemical-resistant, low-extractable polypropylene tubes in the 30 mL volume class
- Cell culture harvest, cell washing, and density-gradient separations where a 30 mL freestanding tube eliminates the need for a dedicated rack
- Environmental sample processing and large-volume aliquoting where molded-in 5 mL graduations ensure accurate volume measurement without transfer steps
- Color-coded tube inventory management in multi-workflow laboratories — the black cap distinguishes this tube from other cap-color variants in the same product family
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers and saline | Excellent |
| Dilute acids and bases | Excellent |
| Ethanol and isopropanol | Good — short-term contact |
| Ketones (e.g., acetone) | Limited — not recommended for prolonged contact |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
| Aromatic hydrocarbons | Not recommended |
| Autoclave sterilization | Compatible (PP is autoclavable; tubes are supplied non-sterile) |
Quality & Procurement
Made in USA, these Caplugs® Evergreen centrifuge tubes are manufactured from BPA-free, phthalate-free polypropylene resin with lot numbering to support traceability requirements in CAP-, CLIA-, and ISO 15189-accredited laboratories. The unassembled 1000/Bag format reduces packaging footprint and per-unit cost for high-throughput facilities. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory, with tiered volume pricing available for institutional, hospital, and grant-funded accounts.
Frequently Asked Questions
Are these centrifuge tubes sterile?
No — they are supplied non-sterile. For most clinical chemistry, molecular extraction, and environmental applications this is standard practice. If your protocol requires sterile vessels, contact your lab manager to evaluate a validated sterilization step or an alternative product.
What is the purpose of the integrated spork on the cap?
The spork is a small spatula-like tool molded directly into the black cap that enables fecal and stool specimen collection in the same vessel used for centrifugation and storage, eliminating transfer steps and reducing handling risks in clinical microbiology and parasitology workflows.
Do the tubes require a rack to stand upright?
No — the freestanding flat-bottom base allows the tubes to stand independently on the bench, in a biosafety cabinet, or inside a centrifuge rotor bucket without any additional rack hardware.
Can these tubes be autoclaved?
Polypropylene is autoclavable as a material, and the tubes are supplied non-sterile specifically because most users do not require sterility. If autoclaving is needed, verify that your autoclave cycle parameters are compatible with the tube dimensions before processing a full batch.