30 mL Freestanding Centrifuge Tubes, Polypropylene, Green Caps — 240-3530-G30 | 1000/Bag
These 30 mL polypropylene centrifuge tubes feature a freestanding flat-bottom base, molded-in graduations every 5 mL, and green screw caps for color-coded sample identification. Rated to 10,000 × g and supplied non-sterile in bulk 1000/Bag format (unassembled), they are well suited for high-throughput clinical, research, and diagnostic workflows where a large-volume, rack-free tube is essential. Part number 240-3530-G30 is a Caplugs® Evergreen product manufactured in the USA.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-3530-G30 |
| Product Type | Freestanding Centrifuge Tube |
| Volume | 30 mL |
| Maximum RCF | 10,000 × g |
| Graduations | Molded-in, every 5 mL |
| Base Style | Freestanding Flat Bottom |
| Cap Color | Green |
| Tube Body Color | Natural (clear) |
| Material | Polypropylene (PP) |
| Sterility | Non-Sterile |
| Format | Unassembled |
| Pack Size | 1000/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Clinical chemistry and molecular diagnostics requiring a 30 mL centrifuge tube rated to 10,000 × g
- Nucleic acid (DNA/RNA) extraction and purification workflows
- Cell culture media preparation, cell harvest, and protein purification
- Large-volume sample aliquoting and bench-top specimen processing — no rack required thanks to the freestanding base
- Microbiology and environmental laboratory sample concentration
- Color-coded batch management: green cap convention supports heparin-type specimen identification and multi-color tube systems in CAP/CLIA/ISO 15189-accredited laboratories
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 only; verify before use |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
| Aromatic solvents (toluene, xylene) | Not recommended |
| Autoclave / steam sterilization | Compatible (PP is autoclavable; tubes are supplied non-sterile) |
Quality & Procurement
Made in USA, these Caplugs® Evergreen centrifuge tubes are produced under ISO 9001 quality management from BPA-free, phthalate-free polypropylene resin with lot-numbering to support traceability requirements in CAP-, CLIA-, and ISO 15189-accredited laboratories. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with tiered volume pricing available for institutional procurement, hospital systems, and grant-funded research facilities.
Frequently Asked Questions
Are these centrifuge tubes sterile?
No — they are supplied non-sterile and unassembled in 1000/Bag packaging. If your workflow requires sterility, the tubes may be autoclaved prior to use given their polypropylene construction.
What is the maximum centrifugation speed for these tubes?
The tubes are rated to 10,000 × g, making them suitable for standard benchtop centrifuges used in clinical chemistry, nucleic acid extraction, and cell harvest protocols.
Do the tubes require a rack for bench-top use?
No. The freestanding flat-bottom base allows the tubes to stand upright on the bench without any additional rack or holder, streamlining specimen staging and aliquoting workflows.
What does the green cap signify?
Green is a widely recognized color convention in clinical and research laboratory tube management — commonly associated with heparin-type specimens and used for color-coded batch grouping. Laboratories operating multi-cap-color systems can use the green caps on 240-3530-G30 to distinguish sample sets and reduce processing errors.