Polypropylene Test Tube Racks

Molded from high-purity polypropylene, these racks feature an optimal structural density that allows them to be safely used in heated water baths without floating or tipping over. The chemical-resistant plastic structure stands up beautifully to aggressive solvents, biological materials, and repeated high-temperature steam sterilization cycles inside an autoclave.

Features:

• Anti-Buoyant Water Bath Architecture: Eliminates the frustration of weighted anchors or improvised restraints. These racks stay anchored to the floor of your water bath, keeping tubes perfectly submerged and upright.
• Molded Alphanumeric Side Grids: Indexing coordinates are permanently molded into the side profiles of the frame. This structural mapping assists processing teams with effortless sample identification and sorting, reducing row-placement errors.
• Space-Saving Flat Storage: Because the racks snap apart as cleanly as they lock together, spare units can be disassembled into flat panels and stored in a drawer, reclaiming precious laboratory shelf real estate.

Laboratory Submersion & Sterilization Strategy:

• Water Bath Evaporation Check: While these racks are heavy enough to resist floating, always make sure the water level in your bath does not exceed the midpoint of your shortest tube. This precaution prevents ambient splashing or water-bath media from seeping into the tube caps and causing sample contamination.
• Autoclaving Parameters: When running these racks through an autoclave cycle (121°C at 15 psi for 15 minutes), they can remain fully assembled. Ensure they are placed flat on the sterilization tray without heavy equipment resting on top of them to prevent localized warping while the polymer is hot.
• FACS Tube Compatibility: The 90-place model (R1115) is specifically optimized to provide an exact structural fit for standard 5 mL (12 x 75 mm) polystyrene or polypropylene FACS tubes, making it a stellar accessory for high-throughput flow cytometry labs.