30 mL Freestanding Centrifuge Tubes with Screw Cap, Polypropylene — Natural, 250/Bag
These 30 mL freestanding polypropylene centrifuge tubes (part number 220-3530-030) are a large-volume solution for cell culture harvest, bulk reagent preparation, density gradient centrifugation, and SPE eluate collection at the bench. The flat, freestanding base eliminates rack dependency during high-throughput batch processing, while the compatible screw cap (sold separately) provides a secure closure. Supplied non-sterile in a convenient 250/Bag format, these tubes are ready for high-volume procurement in clinical, research, and biotech environments.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 220-3530-030 |
| Capacity | 30 mL |
| Geometry | Freestanding base, centrifuge tube body |
| Material | Polypropylene (PP) |
| Color | Natural |
| Cap | Compatible screw cap (sold separately) |
| Sterility | Non-Sterile |
| Pack Size | 250/Bag |
| BPA / Phthalate / Latex | BPA-Free, Phthalate-Free, Latex-Free |
| Country of Origin | USA |
Applications
- Cell culture harvest: rack-free bench handling of suspension cultures at the 30 mL scale
- Bulk reagent preparation at the bench — the freestanding base keeps tubes upright without a rack
- SPE eluate collection under a manifold, with full compatibility with acetonitrile and methanol eluents
- Density gradient centrifugation (Ficoll, Percoll) in swing-bucket or fixed-angle rotors — verify rotor accepts this tube format
- Water bath incubation up to approximately 80 °C, supported by the PP thermal rating
- Cold storage at 4 °C or −20 °C for biological samples and frozen aliquots
- Organic-solvent centrifugation protocols requiring acetonitrile, methanol, ethanol, or IPA compatibility
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent — inert across pH 2–12 |
| Dilute acids / bases (<10%) | Excellent — broad pH resistance |
| Methanol / acetonitrile (<100%) | Excellent — full organic solvent compatibility |
| Ethanol / IPA (<100%) | Excellent — suitable for extraction and fixation |
| Ethyl acetate | Limited — short-term contact only |
| Dichloromethane / chloroform | Not compatible — causes cracking; do not use |
| Cell culture media | Excellent — standard biological matrix |
| Cold storage (−20 °C) | Excellent — suitable for standard freezer storage |
Quality & Procurement
Made in USA, these Caplugs® Evergreen centrifuge tubes are manufactured from FDA-compliant, BPA-free, phthalate-free, and latex-free polypropylene resin. LabSupplies.com is an authorized dealer and ships from USA inventory, typically the same business day for stocking items. Volume pricing is available for orders of 10 or more bags, making these tubes an economical choice for high-throughput clinical laboratories, biotech companies, and research institutions managing large consumable budgets.
Frequently Asked Questions
Do these tubes come with screw caps included?
No — the compatible screw cap is sold separately. Be sure to add the appropriate cap to your order so tubes are ready for use upon arrival.
Are these centrifuge tubes autoclavable?
Polypropylene is generally autoclavable; however, autoclave compatibility for this specific tube has not been confirmed in the product data provided. Contact your lab safety officer or test a small quantity before autoclaving production batches.
What centrifugation speeds are these tubes rated for?
The source data references bench centrifuge use up to 3,000 × g with a 30 mL conical adapter. Always verify that your specific rotor and adapter accept this freestanding tube format before centrifugation.
Can I use these tubes with organic solvents such as acetonitrile or methanol?
Yes — polypropylene provides excellent compatibility with acetonitrile and methanol at concentrations up to 100%, making these tubes well suited for SPE eluate collection and other organic-solvent centrifugation workflows. Dichloromethane and chloroform are not compatible and should not be used.