Fisherbrand Centrifuge Tube 0.5 ml O-Ring Screw Cap Case of 2500 Tubes

Fisherbrand 0.5 ml Microcentrifuge Tubes with O-Ring Screw Cap (2681370)

The Fisherbrand 2681370 is a premium, 0.5 ml microcentrifuge tube engineered for the secure handling and long-term storage of sensitive biological samples and chemical reagents. Manufactured from high-clarity, medical-grade virgin polypropylene, these tubes feature a precision-molded screw cap equipped with an ethylene propylene (EP) O-ring. This internal seal ensures a 100% leak-proof and airtight closure, effectively preventing sample evaporation and contamination even during extreme temperature fluctuations or high-speed centrifugation. Designed with a conical bottom for maximum sample recovery and a skirted base for convenient self-standing operation, the 2681370 is the ideal choice for genomics, proteomics, and clinical diagnostic applications requiring the highest level of sample integrity.

Technical Performance and Design

• Integrated O-Ring Seal: The internal O-ring provides a robust, fail-safe seal that maintains integrity during transport, vortexing, and rapid freezing/thawing cycles.

• Self-Standing Skirted Base: Features a stable, flat-bottom skirt that allows the tube to stand upright on laboratory benches without a rack, facilitating easier one-handed operation.

• High-Clarity Polypropylene: The ultra-clear resin allows for easy visual inspection of samples and pellet formation, while offering excellent chemical resistance to common laboratory solvents.

• Extreme Temperature Rating: Specifically designed for stability across a wide temperature range, from ultra-low temperature freezers (-196°C in vapor phase LN2) to boiling water baths (+100°C).

Product Specifications

• Catalog Number: 2681370

• Volume Capacity: 0.5 ml

• Cap Type: Screw Cap with O-Ring (Attached/Unattached - please verify physical unit)

• Tube Style: Conical Bottom with Skirted Base

• Material: 100% Virgin Polypropylene (USP Class VI)

• Centrifugation Rating: Rated for high-speed rotors (typically up to 17,000–20,000 x g).

• Purity: Certified DNase, RNase, and Pyrogen-free.

Key Benefits & Applications

• Cryogenic Storage: The O-ring seal is essential for the long-term preservation of DNA, RNA, and protein samples in vapor-phase liquid nitrogen or ultra-low freezers.

• PCR & Molecular Biology: Ideal for the preparation of master mixes and sensitive enzymatic reactions where evaporation must be eliminated.

• Diagnostic Kit Component: Frequently used as primary containers for high-value reagents in commercial diagnostic and research kits.

• Hazardous Material Handling: The secure screw-cap closure provides an extra layer of safety when handling infectious agents or radioactive isotopes.

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