50 mL & 30 mL Centrifuge Tube Racks — 20-Position, Yellow Polystyrene, 6/Bag (240-3500-Y10)
These yellow polystyrene centrifuge tube racks hold both 30 mL and 50 mL conical centrifuge tubes in 20 positions, making them a single-format solution for the two most common large-volume tube sizes used across clinical, research, and biotech laboratories. Supplied non-sterile in bags of six, part number 240-3500-Y10 is an economical choice for high-throughput labs that need consistent, color-coded tube organization at the bench, during centrifugation staging, and in storage.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-3500-Y10 |
| Product Type | Centrifuge Tube Rack |
| Compatible Tube Sizes | 30 mL and 50 mL conical centrifuge tubes |
| Number of Positions | 20 |
| Material | Polystyrene (PS) |
| Color | Yellow |
| Sterility | Non-Sterile |
| BPA / Phthalate Free | Yes |
| Pack Size | 6/Bag |
| Lot Numbered | Yes |
| Country of Origin | USA |
Applications
- Centrifugation staging: organizing tubes before and after runs in clinical chemistry and molecular diagnostics workflows
- Cell culture: holding 50 mL conical tubes during media preparation, cell resuspension, and aliquoting
- Microbiology: batch incubation and specimen processing using 30 mL or 50 mL tubes
- Research laboratories: color-coded rack assignment by assay type, sample batch, or department in multi-rack workstations
- Laboratory storage: stable upright tube organization in refrigerators, incubators, and on benchtops
- CAP, CLIA, and ISO 15189 environments: lot-numbered bags support reagent and consumable traceability documentation
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers and saline | Excellent |
| Dilute acids and bases | Good — short-term contact |
| Ethanol >70% | Not recommended |
| Acetone | Not recommended |
| Chlorinated or aromatic solvents | Not recommended |
| Autoclaving | Not compatible |
Quality & Procurement
Made in USA, these Caplugs® Evergreen centrifuge tube racks are manufactured to ISO-certified dimensional standards, ensuring consistent rack geometry, position spacing, and color uniformity across every bag. The BPA-free, phthalate-free polystyrene construction meets modern laboratory safety expectations, and every bag carries a lot number to satisfy CAP, CLIA, and ISO 15189 consumable traceability requirements. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with tiered pricing available for high-volume and institutionally funded laboratories.
Frequently Asked Questions
Do these racks hold both 30 mL and 50 mL tubes in the same rack?
Yes — each rack accommodates both 30 mL and 50 mL conical centrifuge tubes across all 20 positions, so labs using both tube sizes do not need separate rack formats.
Are the racks autoclavable?
No. Polystyrene is not autoclavable. These racks are intended for standard benchtop and storage use with non-sterile workflows. For autoclavable rack options, consider polypropylene alternatives.
Why yellow? Can I use multiple colors to organize my lab?
Yellow color-coding allows teams to assign racks by assay type, specimen batch, or department at a glance in multi-rack workstations, reducing handling errors. Caplugs® Evergreen offers centrifuge tube racks in additional colors if your lab uses a color-coded organization system.
Are these racks lot-numbered for compliance documentation?
Yes — every bag is lot-numbered, supporting consumable traceability records required under CAP, CLIA, and ISO 15189 laboratory accreditation standards.