Every cell culture, centrifugation, and sample processing workflow eventually depends on a steady supply of 50 mL conical tubes. The Heathrow Scientific HS4427 50 mL Conical Centrifuge Tube is engineered to deliver on every standard — sterile and DNase/RNase-free lot to lot, rated to 9,500 × g, with imprinted 5 mL graduations up to 50 mL and a leak-proof screw cap with writing area. Available in two case formats: Bulk Wrap for labs with their own racks, and Racked for labs that prefer tubes pre-organized in recyclable chipboard racks.
Both formats ship in a Case of 500 tubes with lot-to-lot traceability and easy-tear packaging. The 3-year sterile expiration date provides long-term stock shelf life for labs ordering in bulk. Polypropylene construction is chemical-resistant and fully autoclavable for downstream sterilization when required.
Features and Benefits
Sterile with 3-Year Shelf Life: Factory-sterile with a 3-year sterile expiration date — long shelf life supports bulk stock purchasing programs without sterilization date pressure.
DNase and RNase Free: Lot-certified clean — eliminates nuclease contamination risk in RNA isolation, genomics, and molecular biology applications where tube cleanliness is non-negotiable.
9,500 × g Centrifuge Rating: High-speed rated for standard conical tube centrifuge protocols — suitable for cell pelleting, precipitation, and density gradient applications at standard centrifuge RPM settings.
Imprinted 5 mL Graduations: Clearly marked volume indicators at every 5 mL interval up to 50 mL — accurate visual volume reading without a separate graduated cylinder.
Leak-Proof Screw Cap with Writing Area: Flat polyethylene cap provides a secure seal for sample containment and a writable surface for direct labeling — no separate cap labels required.
Lot-to-Lot Traceability: Easy-tear packaging includes lot information for complete batch traceability — essential for GLP, GMP, and regulated research environments.
Available Bulk Wrap or Racked: Choose Bulk Wrap (HS4427B) for labs with existing conical tube racks; choose Racked (HS4427R, 20 racks × 25 tubes) for labs that prefer pre-organized tubes in recyclable chipboard racks.
Specifications
| Property | Value |
|---|---|
| SKU (Bulk Wrap) | HS4427B |
| SKU (Racked) | HS4427R |
| Brand | Heathrow Scientific |
| Volume | 50 mL |
| Material | Polypropylene |
| Diameter | 1.1 in (2.9 cm) |
| Height | 114 mm |
| Max RCF | 9,500 × g |
| Graduations | 5 mL intervals up to 50 mL |
| Cap Style | Leak-proof screw cap (polyethylene, with writing area) |
| Sterile | Yes — 3-year sterile expiration |
| DNase/RNase Free | Yes — lot certified |
| Autoclavable | Yes |
| Quantity per Case | 500 tubes (Bulk Wrap: 1 bag of 500; Racked: 20 racks × 25 tubes) |
| Country of Origin | China |
Bulk Wrap vs. Racked — Which Should I Order?
| Format | SKU | Best For | Packaging | Price |
|---|---|---|---|---|
| Bulk Wrap | HS4427B | Labs with existing conical tube racks | 500 tubes in single bulk bag | Lower per-tube cost |
| Racked | HS4427R | Labs wanting pre-organized, ready-to-use tubes | 20 chipboard racks × 25 tubes | Convenient organization included |
Laboratory Applications
Cell culture media preparation and sterile reagent aliquoting where DNase/RNase-free sterile tubes are required from the first use
High-speed centrifugation for cell pelleting, density gradients, and precipitation protocols up to 9,500 × g
RNA isolation and genomics sample collection where nuclease-free tube certification is required throughout the protocol
Regulated research and GLP environments requiring lot-traceable, certified sterile consumables with documented expiration dates
Frequently Asked Questions
Are these tubes compatible with standard conical tube centrifuge rotors?
Yes. The HS4427 tubes have standard 50 mL conical geometry compatible with fixed-angle and swinging-bucket centrifuge rotors from Beckman Coulter®, Thermo Scientific®, Eppendorf®, and other major manufacturers. Confirm your rotor's maximum rated speed does not exceed 9,500 × g for these tubes.
What is the difference between Bulk Wrap and Racked?
See the comparison table above. Bulk Wrap (HS4427B) delivers 500 tubes in a single bag at a lower per-tube price — ideal for labs with existing tube racks. Racked (HS4427R) delivers 20 chipboard racks of 25 tubes each, organized for immediate benchtop use. Both contain the same 50 mL sterile DNase/RNase-free tubes.
Are the chipboard racks in the Racked version recyclable?
Yes. The chipboard racks used in the Racked format (HS4427R) are made from recyclable material, which reduces the environmental footprint compared to plastic rack packaging.
How long is the sterile expiration?
Both formats carry a 3-year sterile expiration date from the manufacture date — check the lot label for the specific expiration date of each case received.
Quality Assurance
Heathrow Scientific manufactures HS4427 50 mL Conical Tubes from virgin polypropylene with lot-by-lot certification for sterility, DNase-free status, and RNase-free status. Each case includes lot traceability documentation. Tubes are tested for 9,500 × g structural integrity and leak-proof cap seal performance prior to release.
Academic and Institutional Pricing
LabSupplies.com offers tiered quantity pricing for academic and research institutions. As an authorized dealer, we ship directly from USA inventory.