1.5 mL / 2.0 mL Microcentrifuge Tube Racks — 96-Position, PP, Red, 5/Pack (240-6388-R30)
These 96-position polypropylene tube racks hold standard 1.5 mL and 2.0 mL microcentrifuge tubes in an 8 × 12 grid with 9 mm center-to-center well spacing that mirrors the SBS microplate footprint. Molded in red — a color compounded directly into the PP matrix for permanent stability — they align with the CLSI H3 color convention for no-additive serum tubes, making them a natural fit for clinical chemistry and immunoassay sample staging. Supplied non-sterile in packs of five, part number 240-6388-R30 is autoclavable at 121 °C and compatible with UV decontamination for clean-bench environments.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-6388-R30 |
| Configuration | 96 positions, 8 × 12 grid |
| Well Spacing | 9 mm center-to-center (SBS microplate footprint) |
| Tube Compatibility | 1.5 mL and 2.0 mL microcentrifuge tubes (11 mm OD) |
| Material | Polypropylene (PP) |
| Color | Red (pigment compounded into PP matrix) |
| Color Convention | CLSI H3 — no-additive/serum tubes |
| Compatible Lid | 300-6388 PPC Natural (sold separately, 5/Pack) |
| Sterility | Non-Sterile |
| Pack Size | 5/Pack |
| Autoclave Compatibility | 121 °C / 15 psi |
| UV Decontamination | Compatible (254 nm standard cycle) |
| Country of Origin | USA |
Applications
- Clinical chemistry and serology sample staging — red color aligns with CLSI H3 serum-tube convention for immediate visual identification
- STAT priority triage — red racks signal urgent sample processing in standard clinical laboratory SOPs without secondary labeling
- PCR setup and nucleic acid workflow organization across the full 96-position plate format
- Centrifuge loading and post-spin sample management for 1.5 mL and 2.0 mL microcentrifuge tubes
- Automated liquid-handling integration — 9 mm well spacing and SBS footprint allow direct addressing by 96-channel pipetting workstations
- Sample archiving and incubation storage, optionally covered with the compatible 300-6388 PPC lid for dust protection and rack stacking
Compatibility
The 8 × 12 grid layout conforms to the standard SBS microplate footprint, enabling direct integration with automated liquid-handling platforms and 96-channel pipetting workstations that address microcentrifuge tubes in plate-coordinate format. Wells accept 11 mm OD tubes — including Eppendorf®-style 1.5 mL and 2.0 mL microcentrifuge tubes — with positive retention that supports smooth one-handed tube management during rapid pipetting. The optional 300-6388 PPC Natural lid (sold separately in a matching 5/Pack) fits this rack for dust protection during incubation steps and allows loaded racks to be stacked. For labs that use a full color-coding scheme, the 240-6388 family is also available in Natural, Blue, Orange, Green, Lavender, and Yellow, allowing complete color-scheme procurement from a single vendor.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids and bases | Excellent |
| 70% ethanol (disinfection wipes) | Good — routine disinfection compatible |
| Dilute bleach / hypochlorite | Good — short-term decontamination compatible |
| Autoclave (121 °C / 15 psi) | Compatible |
| UV decontamination (254 nm) | Compatible |
| Chlorinated solvents / aromatic solvents | Not recommended |
Quality & Procurement
Made in USA, these Caplugs® Evergreen racks are molded from virgin polypropylene under ISO 9001 quality management, ensuring consistent well geometry and dimensional stability across every production lot. The red pigment is compounded directly into the PP matrix — not applied as a surface coating — so color integrity is maintained through autoclave cycles, alcohol wipes, and UV decontamination without risk of pigment leaching. LabSupplies.com is an authorized dealer of Caplugs® Evergreen laboratory consumables and ships from USA inventory, with tiered pricing available for high-volume institutional and grant-funded procurement programs.
Frequently Asked Questions
Are these racks autoclavable?
Yes. The polypropylene construction is compatible with standard steam autoclaving at 121 °C / 15 psi, allowing decontamination between experiments or before use in sensitive workflows.
Will standard Eppendorf-style 1.5 mL tubes fit securely?
Yes. The wells are sized for 11 mm OD microcentrifuge tubes — the standard diameter for 1.5 mL and 2.0 mL Eppendorf-style tubes — and provide positive retention without requiring excessive insertion force.
Can these racks be used on automated liquid-handling platforms?
The 8 × 12 grid with 9 mm center-to-center well spacing matches the SBS microplate footprint, allowing direct integration with 96-channel pipetting workstations that address tubes in plate-coordinate format. Verify your specific instrument's labware library for exact configuration details.
Is a lid available to cover loaded racks during storage or incubation?
Yes. The 300-6388 PPC Natural lid (sold separately in a 5/Pack) is designed to fit this rack, providing dust protection and enabling stacking of loaded racks during incubation or storage steps.