{"product_id":"conical-centrifuge-tubes-50ml-green-caps-ppc-non-sterile-1000-bag-unassembled-caplugs-evergreen-2403937g80e1","title":"50 mL Centrifuge Tubes, Conical Bottom, PPC, Green — 240-3937-G80 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e50 mL Conical Centrifuge Tubes, Threaded Cap — PPC, Green, 1000\/Bag (240-3937-G80)\u003c\/h2\u003e\n\u003cp\u003eThese 50 mL conical-bottom centrifuge tubes are molded from Polypropylene Copolymer (PPC) and feature a threaded, leak-resistant cap that delivers a secure seal during centrifugation, sample storage, and transport. Supplied non-sterile in sealed 1000\/Bag packaging, part number 240-3937-G80 is manufactured at Caplugs® Evergreen ISO-certified facilities using virgin-grade, FDA-registered resin. The conical bottom geometry concentrates cell pellets and precipitates at the tube tip for complete, low-dead-volume recovery after centrifugation.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number (MPN)\u003c\/td\u003e\n\u003ctd\u003e240-3937-G80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e50 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBottom Style\u003c\/td\u003e\n\u003ctd\u003eConical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCap Style\u003c\/td\u003e\n\u003ctd\u003eThreaded — leak-resistant seal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolypropylene Copolymer (PPC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eGreen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSterility\u003c\/td\u003e\n\u003ctd\u003eNon-Sterile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e1000\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBPA \/ Phthalate Free\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCell culture harvesting — conical pellet geometry ensures complete cell recovery with minimal residual volume\u003c\/li\u003e\n\u003cli\u003eSerum and plasma separation — threaded closure prevents leaks during centrifugation and subsequent refrigerated storage\u003c\/li\u003e\n\u003cli\u003eProtein precipitation and density gradient centrifugation — conical tip concentrates precipitates and density-separated fractions for easy aspiration\u003c\/li\u003e\n\u003cli\u003eClinical specimen processing and transport — secure threaded cap resists evaporation and contamination in CAP\/CLIA-regulated workflows\u003c\/li\u003e\n\u003cli\u003eReagent preparation and sample storage — large 50 mL capacity accommodates bulk reagent aliquoting and intermediate sample holds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eChemical Resistance\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eReagent \/ Condition\u003c\/th\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAqueous buffers \/ saline\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilute acids\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilute bases\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethanol\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsopropanol\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAcetonitrile\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAromatic \/ chlorinated solvents\u003c\/td\u003e\n\u003ctd\u003eLimited — not recommended for prolonged contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003eMade in USA, these Caplugs® Evergreen conical tubes are produced under ISO-certified quality management from virgin-grade, FDA-registered PPC resin that is BPA-free and phthalate-free. Lot-to-lot dimensional consistency ensures reliable fit in standard centrifuge rotor positions, and sealed 1000\/Bag packaging maintains product integrity from warehouse receipt through point of use. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with tiered pricing available for high-volume institutional and grant-funded laboratories.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these centrifuge tubes sterile?\u003c\/strong\u003e\u003cbr\u003eNo — they are supplied non-sterile in 1000\/Bag packaging. For workflows requiring sterility, downstream sterilization or a sterile-format alternative should be considered.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill the threaded cap hold under centrifugal force?\u003c\/strong\u003e\u003cbr\u003eYes. The threaded closure is designed to provide a leak-resistant seal during centrifugation, making it more reliable under centrifugal force than snap-cap formats and suitable for sample transport applications as well.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs PPC autoclavable?\u003c\/strong\u003e\u003cbr\u003ePolypropylene Copolymer shares the general autoclavability characteristics of polypropylene; however, Caplugs® Evergreen does not certify these specific tubes for autoclave use, so verify your sterilization protocol against the manufacturer's guidance before autoclaving.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between PPC and standard PP for centrifuge tubes?\u003c\/strong\u003e\u003cbr\u003ePolypropylene Copolymer (PPC) incorporates a co-monomer that improves impact resistance and low-temperature flexibility compared to standard homopolymer PP, reducing the risk of cracking during centrifugation or cold-storage handling while retaining excellent chemical resistance to aqueous buffers, dilute acids and bases, and common alcohols.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"50 mL Conical Centrifuge Tubes, Threaded Cap — PPC, Green, 1000\/Bag\",\"sku\":\"2403937G80E1\",\"mpn\":\"240-3937-G80\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene Copolymer (PPC)\",\"color\":\"Green\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"250.90\",\"availability\":\"https:\/\/schema.org\/InStock\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Are these centrifuge tubes sterile?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — they are supplied non-sterile in 1000\/Bag packaging. 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