{"product_id":"fisherbrand-centrifuge-tube-50-ml-racked","title":"Fisherbrand Centrifuge Tube 50 ml Total of 250 Conical Tubes","description":"\u003ch3\u003eFisherbrand Disposable Plastic Centrifuge Tubes – 50 mL, Premium Polypropylene, Conical Bottom, Plug-Seal Screw Cap, Sterile (MPN: 05-539-8)\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Performance and Design\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eHigh-Velocity RCF Force Stability:\u003c\/b\u003e 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.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eLeak-Proof Plug-Seal Screw Cap:\u003c\/b\u003e 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.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eConical Bottom Micro-Pellet Target:\u003c\/b\u003e 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.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eHigh-Contrast Dual Graduation Scales:\u003c\/b\u003e 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.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eCatalog Number \/ MPN:\u003c\/b\u003e 05-539-8 (Also listed under Fisherbrand 055398)\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eManufacturer \/ Brand:\u003c\/b\u003e Fisher Scientific \/ Fisherbrand\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eVolumetric Capacity:\u003c\/b\u003e 50 mL (50 milliliters \/ 1.7 fluid ounces)\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eTube Material Composition:\u003c\/b\u003e High-Clarity Medical-Grade Polypropylene (PP)\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eCap Material \u0026amp; Style:\u003c\/b\u003e High-Density Polyethylene (HDPE) with a deep-threaded Plug-Seal design\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eBase Geometry Profile:\u003c\/b\u003e Conical Bottom (Requires a standard 50 mL tube rack or rotor adapter)\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eSterility \/ Purity Profile:\u003c\/b\u003e Gamma Irradiated Sterile, Certified USP Class VI Non-Pyrogenic, Non-Cytotoxic, and RNase\/DNase-Free\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eStandard Packaging Array:\u003c\/b\u003e Available in wholesale bulk configurations (commonly packed as 25 tubes per sterile resealable sleeve, totaling 500 tubes per master case box)\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Benefits and Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eCell Culture Media \u0026amp; Suspension Handling:\u003c\/b\u003e The primary laboratory standard tool utilized across tissue engineering cores for subculturing mammalian cell lines, harvesting pellet suspensions, and aliquoting bulk media stocks.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eChemical Reagent and Buffer Preparation:\u003c\/b\u003e Highly resilient to chemical degradation, supporting the formulation of standard laboratory salt buffers, dilute acids, organic extraction washes, and fixative mixtures.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eCryogenic and Deep Freezer Archiving:\u003c\/b\u003e 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.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eLarge White Matte Writing Region:\u003c\/b\u003e 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.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\u003cp style=\"margin: 0; font-size: 0.8em;\"\u003e\u003ci\u003eAll product names, logos, and brands are property of their respective owners.\u003c\/i\u003e\u003c\/p\u003e","brand":"Fisherbrand","offers":[{"title":"Default Title","offer_id":44496927293692,"sku":"2098","price":152.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8463\/5132\/files\/fisherbrand-centrifuge-tube-50-ml-total-of-200-conical-tubes-centrifuge-tubes-fisherbrand-902505.jpg?v=1783696528","url":"https:\/\/lifesciencestrading.com\/products\/fisherbrand-centrifuge-tube-50-ml-racked","provider":"Life Sciences Trading","version":"1.0","type":"link"}