96-Position Microcentrifuge Tube Rack — PP, Green, 1.5 mL / 2.0 mL Compatible, 5/Pack (240-6388-G30)
These 96-position polypropylene microcentrifuge tube racks organize standard 1.5 mL and 2.0 mL microcentrifuge tubes in an 8 × 12 grid with 9 mm center-to-center well spacing — matching the SBS microplate footprint for seamless integration with automated liquid-handling platforms. Supplied non-sterile in a 5/Pack, part number 240-6388-G30 is molded in green for color-coded sample tracking, with permanent pigment compounded directly into the PP matrix for lasting color stability through autoclave and UV decontamination cycles. A compatible polypropylene copolymer lid (300-6388, sold separately) is available to add dust protection and enable stacking of loaded racks.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-6388-G30 |
| Configuration | 96 positions, 8 × 12 grid |
| Well Spacing | 9 mm center-to-center |
| Tube Capacity | 1.5 mL and 2.0 mL microcentrifuge tubes (11 mm OD) |
| Material | Polypropylene (PP) |
| Color | Green |
| Sterility | Non-Sterile |
| Pack Size | 5/Pack |
| Autoclave Compatibility | Yes — 121°C / 15 psi |
| UV Decontamination | Yes — 254 nm standard cycle |
| Compatible Lid | 300-6388 PPC Natural (sold separately, 5/Pack) |
| BPA / Phthalates | BPA-free; no phthalate plasticizers |
| Country of Origin | USA |
Applications
- PCR setup staging — organize pre- and post-amplification tubes in a dedicated green rack to prevent cross-contamination confusion in shared lab spaces
- Environmental monitoring and microbiological sample management — green color convention supports project-lane assignment for field and environmental specimens
- Microbiome and 16S rRNA sequencing workflows — designate green racks to a single project in multi-project shared-instrument environments
- Centrifuge loading and pellet-step workflows requiring rapid one-handed tube retrieval from a stable, 96-position footprint
- Sample archiving and cold-storage organization of 1.5 mL and 2.0 mL microcentrifuge tubes in −20°C and −80°C freezers
- Automated liquid-handling integration — the SBS-footprint 8 × 12 grid allows 96-channel pipetting workstations to address tubes in standard plate-coordinate format
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids and bases | Excellent |
| 70% ethanol (disinfection wipe-down) | Good — standard decontamination use |
| Dilute sodium hypochlorite (bleach) | Good — standard decontamination use |
| Acetone / chloroform / aromatic solvents | Not recommended |
| Autoclave (121°C / 15 psi) | Compatible |
| UV decontamination (254 nm) | Compatible |
Quality & Procurement
Made in USA, these racks are manufactured by Caplugs® Evergreen from virgin, BPA-free, phthalate-free polypropylene under ISO 9001 quality management. The green pigment is compounded into the PP matrix — not applied as a surface coating — ensuring permanent color stability that will not fade or leach through repeated autoclave cycles, alcohol wipe-downs, or UV decontamination. LabSupplies.com is an authorized Caplugs® Evergreen dealer and ships from USA inventory; tiered pricing is available for institutional, hospital, and grant-funded procurement. The 240-6388 family is offered in seven colors — Natural, Blue, Orange, Green, Lavender, Red, and Yellow — enabling full color-scheme procurement from a single vendor for multi-user and multi-project bench organization.
Frequently Asked Questions
Can these racks be autoclaved between experiments?
Yes. The polypropylene construction is compatible with standard autoclave cycles at 121°C / 15 psi, making it straightforward to decontaminate racks between projects or before working with sensitive samples.
Do the racks hold 2.0 mL microcentrifuge tubes as well as 1.5 mL?
Yes — the wells are sized for 11 mm OD tubes, which encompasses both standard 1.5 mL and 2.0 mL microcentrifuge tube formats. Tubes seat firmly without excessive insertion force for smooth one-handed operation during rapid pipetting.
Will the SBS footprint work with my automated liquid handler?
The 8 × 12 grid with 9 mm center-to-center spacing matches the SBS microplate footprint, so these racks are compatible with automated liquid-handling platforms and 96-channel pipetting workstations that address tubes in plate-coordinate format. Confirm your instrument's deck adapter requirements before deploying.
Is a lid available to cover loaded racks during incubation or storage?
Yes. The 300-6388 PPC Natural lid is sold separately in a 5/Pack and is designed to fit these racks, providing dust protection during incubation steps and enabling stacking of loaded racks to conserve bench and refrigerator space.