21-Position Test Tube Rack for 30 mm Tubes — Polypropylene Copolymer, Blue (240-3204-B8SI)
These blue polypropylene copolymer test tube racks hold 21 tubes at 30 mm diameter, providing high-density, color-coded organization for clinical, research, and industrial laboratory workstations. Supplied as individual, unassembled units, they arrive in a compact format that simplifies storage and shipping, then assemble quickly for immediate bench use. Part number 240-3204-B8SI is a non-sterile, reusable rack designed for demanding laboratory environments where chemical resistance and impact durability are essential.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 240-3204-B8SI |
| Product Type | Test Tube Rack |
| Tube Size (Diameter) | 30 mm |
| Number of Positions | 21 |
| Material | Polypropylene Copolymer (PPC) |
| Color | Blue |
| Sterility | Non-Sterile |
| Format | Individual, Unassembled |
| Pack Size | 1 rack/unit |
| BPA / Phthalate Free | Yes |
| Lot Numbered | Yes |
| Country of Origin | USA |
Applications
- Clinical chemistry: organizing 30 mm tubes during sample processing, dilution, and analysis workflows
- Hematology and microbiology: stable tube holding during incubation and specimen batching
- Blood bank and serology: color-coded rack organization by specimen category or assay type
- Research laboratories: culture tube management and multi-rack workstation setups
- Industrial quality control: specimen and sample staging in regulated testing environments
- CAP / CLIA / ISO 15189 environments: lot-numbered racks support traceability documentation
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids and bases | Excellent |
| Common laboratory disinfectants | Good |
| Alcohols (<70%) | Good — short-term contact |
| Autoclave / steam sterilization | Compatible |
| Chlorinated / aromatic solvents | Not recommended |
Quality & Procurement
Made in USA, these Caplugs® Evergreen racks are molded from BPA-free, phthalate-free polypropylene copolymer resin under ISO 9001 quality management, with lot numbering on every unit to satisfy traceability requirements in CAP-, CLIA-, and ISO 15189-accredited laboratories. LabSupplies.com is an authorized dealer stocking 240-3204-B8SI in USA inventory, with same-business-day shipping available for stocking items and tiered pricing for institutional and high-volume purchasers.
Frequently Asked Questions
What tube diameter do these racks accept?
These racks are designed for 30 mm diameter test tubes and culture tubes. Using tubes of a significantly different outer diameter may compromise stability, so verify your tube dimensions before ordering.
Do the racks require any tools to assemble?
No — they are supplied unassembled for compact shipping and storage and are designed to be assembled by hand for immediate use without tools.
Can these racks be autoclaved between uses?
Yes. Polypropylene copolymer is autoclave-compatible, making these racks suitable for reusable applications where steam sterilization or chemical disinfection is part of the workflow.
Why are the racks blue?
The blue color supports color-coded organization in multi-rack laboratory workstations, allowing staff to distinguish rack sets by assay type, sample batch, specimen category, or department at a glance without relabeling.