Fisherbrand Centrifuge Tube 50 ml Total of 250 Conical Tubes

Fisherbrand Disposable Plastic Centrifuge Tubes – 50 mL, Premium Polypropylene, Conical Bottom, Plug-Seal Screw Cap, Sterile (MPN: 05-539-8)

The Fisher Scientific 05-539-8 (commonly referenced under the Fisherbrand clinical product lines) is an industry-standard 50 mL disposable centrifuge tube precision-engineered for high-velocity sample separation, chemical reagent preparation, biological sample storage, and general cell culture workflows. Molded from premium, high-clarity medical-grade polypropylene (PP), these tubes feature a conical-bottom geometry that funnels micro-pellets and precipitates down to a centralized low point for clean eluate recovery. Outfitted with a high-density polyethylene (HDPE) plug-seal screw cap, this containment system establishes a leak-proof mechanical joint capable of weathering rigorous vortexing and chemical processing. The exterior wall features permanent, high-contrast black graduation markers alongside a large white writing region, supporting quick sample tracking and volume verification.

Technical Performance and Design

• High-Velocity RCF Force Stability: Engineered with optimized wall thicknesses to withstand intense mechanical stress during centrifugation, safely operating under Relative Centrifugal Forces (RCF) up to 9,400 x g in standard swinging-bucket or fixed-angle rotors.

• Leak-Proof Plug-Seal Screw Cap: Accompanied by a premium green or blue HDPE plug-seal screw cap. The internal cylindrical skirt compresses into the interior rim of the tube barrel, maintaining a tight hermetic seal that prevents fluid loss or evaporation during heavy agitation loops.

• Conical Bottom Micro-Pellet Target: Features a precision-molded 60-degree conical base profile. This geometry concentrates low-volume sedimentations, cellular pellets, or precipitating target extracts into a tight cluster, maximizing supernatant aspiration efficiency.

• High-Contrast Dual Graduation Scales: Outfitted with permanent, smear-resistant black printed volumetric lines spanning from 5 mL to 50 mL in precise 2.5 mL increments, allowing for mistake-free fluid level tracking under biological safety hoods.

Product Specifications

• Catalog Number / MPN: 05-539-8 (Also listed under Fisherbrand 055398)

• Manufacturer / Brand: Fisher Scientific / Fisherbrand

• Volumetric Capacity: 50 mL (50 milliliters / 1.7 fluid ounces)

• Tube Material Composition: High-Clarity Medical-Grade Polypropylene (PP)

• Cap Material & Style: High-Density Polyethylene (HDPE) with a deep-threaded Plug-Seal design

• Base Geometry Profile: Conical Bottom (Requires a standard 50 mL tube rack or rotor adapter)

• Sterility / Purity Profile: Gamma Irradiated Sterile, Certified USP Class VI Non-Pyrogenic, Non-Cytotoxic, and RNase/DNase-Free

• Standard Packaging Array: Available in wholesale bulk configurations (commonly packed as 25 tubes per sterile resealable sleeve, totaling 500 tubes per master case box)

Key Benefits and Applications

• Cell Culture Media & Suspension Handling: The primary laboratory standard tool utilized across tissue engineering cores for subculturing mammalian cell lines, harvesting pellet suspensions, and aliquoting bulk media stocks.

• Chemical Reagent and Buffer Preparation: Highly resilient to chemical degradation, supporting the formulation of standard laboratory salt buffers, dilute acids, organic extraction washes, and fixative mixtures.

• Cryogenic and Deep Freezer Archiving: Built from a cold-resistant polymer matrix capable of safely weathering long-term mechanical storage within deep laboratory freezers down to minus 80°C (-80°C) without cracking or becoming brittle.

• Large White Matte Writing Region: Features a generous, textured matte white marking panel along the side wall that accepts standard laboratory marker ink without smudging, ensuring mistake-free sample indexing and tracking.

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