Eppendorf Centrifuge Tube 5 ml Screw Cap Polypropylene 400 Tubes

Eppendorf 0030122321 Conical Tubes – 5 mL, Screw Cap, Polypropylene

The Eppendorf 0030122321 is a premium 5 mL conical tube designed to bridge the gap between standard 1.5 mL microcentrifuge tubes and large 15 mL conical tubes. Engineered for the secure handling of medium-volume samples, this tube features a high-performance screw cap that provides an absolute, leak-proof seal for storage and incubation. Molded from ultra-pure, high-clarity virgin polypropylene, it offers exceptional chemical resistance and thermal stability. Whether used for cell culture feeding, master mix preparation, or long-term sample biobanking, the 5 mL format minimizes sample-to-plastic surface contact and significantly reduces the storage volume required in freezers and centrifuges.

Technical Performance and Design

• Flattened and Grooved Screw Cap: The ergonomically designed cap features a flattened top for easy labeling and a grooved surface for a secure grip, even when wearing gloves. The specialized thread geometry ensures a tight seal that prevents evaporation and leakage during high-stress applications.

• High Centrifugal Stability: Despite its compact size, this tube is built with reinforced walls that safely withstand centrifugal forces up to 25,000 x g. This allows for the rapid pelleting of cells, bacteria, or yeast without the risk of tube deformation or breakage.

• Superior Material Purity: Manufactured without the use of slip agents, plasticizers, or biocides—substances that can leach into samples and negatively impact bioassays or spectrophotometric measurements. Certified to be free of detectable DNase, RNase, and DNA.

• Enhanced Sample Recovery: The conical bottom geometry is optimized for the complete retrieval of pellets and supernatants, while the high-quality polypropylene ensures an ultra-smooth interior that minimizes non-specific binding of proteins and nucleic acids.

Product Specifications

• Catalog Number: 0030122321

• Volume Capacity: 5.0 mL

• Material: High-purity Polypropylene (PP)

• Cap Type: Screw Cap (Leak-proof)

• Centrifugation Limit: Up to 25,000 x g

• Temperature Range: -86°C to +100°C (Autoclavable when open)

• Packaging: 4 bags of 50 tubes (200 tubes total)

Key Benefits & Applications

• Optimized Storage: Drastically reduces the amount of space needed in -80°C freezers. You can store up to 2.5 times more samples in a standard freezer box compared to using 15 mL tubes for the same volume.

• Cell Culture & Molecular Biology: The ideal vessel for preparing large-volume PCR master mixes, diluting antibodies, or harvesting small cell pellets where a 15 mL tube would result in excessive "dead space" and potential contamination.

• Safe Incubation: The screw cap provides a much more secure seal than snap-caps for high-temperature incubations or when working with volatile solvents, ensuring that the lid will not pop open unexpectedly.

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