30 mL Freestanding Centrifuge Tubes, Polypropylene, Green Cap with Integrated Spork — 1000/Bag
These 30 mL polypropylene centrifuge tubes feature a freestanding flat-bottom base, molded-in graduations every 5 mL, and a green screw cap with an integrated spork for fecal and stool specimen collection workflows. Rated to 10,000 × g and supplied non-sterile in a 1000/Bag unassembled format, part number 240-3534-G30 is well-suited for high-throughput clinical, molecular, and research laboratories that require large-volume centrifugation without the overhead of separate rack infrastructure.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-3534-G30 |
| Volume | 30 mL |
| Maximum RCF | 10,000 × g |
| Graduations | Molded-in, every 5 mL |
| Cap Color | Green |
| Cap Style | Screw cap with integrated spork |
| Tube Body Color | Natural (clear) |
| Base Style | Freestanding flat bottom |
| Material | Polypropylene (PP) |
| Sterility | Non-Sterile |
| Format | Unassembled, 1000/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Fecal and stool specimen collection, transport, and processing — enabled by the integrated spork cap
- High-speed centrifugation up to 10,000 × g in clinical chemistry, molecular diagnostics, and microbiology workflows
- Nucleic acid (DNA/RNA) extraction requiring a large-volume, chemically resistant polypropylene tube
- Cell culture harvest, protein purification, and cell pellet preparation
- Sample aliquoting, reagent preparation, and bench-top staging where a freestanding tube eliminates the need for a separate rack
- Color-coded multi-tube laboratory management systems using green caps to identify tube type or batch
- Lot-traceable workflows in CAP-, CLIA-, and ISO 15189-accredited laboratories
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers and saline | Excellent |
| Dilute acids and bases | Excellent |
| Alcohols (ethanol, isopropanol) | Good — suitable for typical extraction protocols |
| Ketones (acetone) | Limited — short-term contact only; evaluate for your application |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
| Aromatic solvents (toluene, xylene) | Not recommended |
Quality & Procurement
Made in USA, these Caplugs® Evergreen centrifuge tubes are manufactured from BPA-free, phthalate-free polypropylene resin 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, clinical, and grant-funded purchasing programs.
Frequently Asked Questions
Are these centrifuge tubes sterile?
No — the 240-3534-G30 tubes are supplied non-sterile. For workflows requiring sterility, verify whether a sterile alternative is available or implement your laboratory's validated sterilization protocol before use.
What is the integrated spork, and which applications require it?
The green screw cap includes a molded spork — a combined spoon/fork implement — used for collecting and transferring fecal or stool specimens. This makes the tube a self-contained collection and transport vessel, eliminating the need for a separate collection tool in parasitology, occult blood, and gastrointestinal pathogen testing workflows.
Do these tubes require a rack for bench-top use?
No. The freestanding flat-bottom base allows the tubes to stand upright on any flat bench surface without a rack, simplifying specimen staging, aliquoting, and temporary storage during processing.
What does "unassembled" mean for the 1000/Bag format?
The tubes and caps are packed separately within the bag and are not pre-assembled at the factory. This reduces shipping volume and allows labs to assemble tubes as needed, keeping unused caps clean and reducing storage footprint for high-volume operations.