{"product_id":"round-bottom-test-tubes-16ml-17-x-100mm-snap-cap-ppc-222239408ie1","title":"16 mL Test Tubes, Round Bottom, PPC, Natural — 222-2394-08I | 1\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e16 mL Round-Bottom Test Tubes with Two-Position Snap Caps — PPC, Natural, Sterile (222-2394-08I)\u003c\/h2\u003e\n\u003cp\u003eThese 16 mL polypropylene copolymer (PPC) round-bottom test tubes measure 17 × 100 mm and arrive sterile in individual packaging, ready for flow cytometry, cell sorting, immunofluorescence, and other cell-based workflows where maintaining sterility through point-of-use is critical. The integrated two-position snap cap toggles between a vented configuration for gas exchange during incubation and a sealed configuration for containment during transport or centrifugation. Part number 222-2394-08I is manufactured by Caplugs® Evergreen from virgin-grade, FDA-registered PPC resin at an ISO-certified domestic facility.\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\u003e222-2394-08I\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e16 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e17 × 100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBottom Style\u003c\/td\u003e\n\u003ctd\u003eRound Bottom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCap Type\u003c\/td\u003e\n\u003ctd\u003eTwo-Position Snap Cap (vented \/ sealed)\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\u003eNatural\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSterility\u003c\/td\u003e\n\u003ctd\u003eSterile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e1 \/ Individually Packed\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\u003e\n\u003cstrong\u003eFlow Cytometry \u0026amp; FACS:\u003c\/strong\u003e The 17 × 100 mm round-bottom format is the standard geometry for most flow cytometer sample-uptake probes; the two-position cap seals tubes during transport to the instrument.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell Sorting \u0026amp; Immunofluorescence:\u003c\/strong\u003e Round-bottom geometry concentrates stained cell populations into a tight pellet after centrifugation, enabling efficient resuspension in buffer or antibody solution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHematology Sample Preparation:\u003c\/strong\u003e The 16 mL working volume accommodates whole-blood dilutions and lysis protocols common in CBC differential workflows.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerological \u0026amp; Agglutination Testing:\u003c\/strong\u003e The round base promotes uniform agglutination patterns for gel card or tube-based blood bank assays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeneral Specimen Handling \u0026amp; Storage:\u003c\/strong\u003e Individual sterile packaging makes these tubes suitable for primary specimen collection and freeze-thaw cycling without cross-contamination risk.\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\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsopropanol\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAcetonitrile\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAromatic solvents (benzene, toluene, xylene)\u003c\/td\u003e\n\u003ctd\u003eUse with caution — verify before use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChlorinated solvents (chloroform, DCM)\u003c\/td\u003e\n\u003ctd\u003eNot recommended\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 tubes are produced under ISO-certified quality management using virgin-grade, FDA-registered PPC resin that is BPA-free and phthalate-free. Individual sterile packaging provides lot-level traceability to support CAP, CLIA, and ISO 15189 accreditation documentation requirements. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with tiered volume pricing available for hospitals, reference labs, and research institutions purchasing on grant or institutional accounts.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these tubes sterile, and does individual packaging preserve that sterility?\u003c\/strong\u003e\u003cbr\u003eYes — each tube is sterilized and sealed in individual packaging at the factory. The sterility barrier remains intact until you open the package, making these tubes appropriate for cell culture, specimen collection, and any workflow where contamination control is paramount.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat does \"two-position snap cap\" mean in practice?\u003c\/strong\u003e\u003cbr\u003eThe cap has two distinct locking positions: one that leaves a small vent opening for gas exchange during incubation or when using CO₂-sensitive assays, and a second fully closed position that seals the tube for centrifugation, transport, or storage. No separate cap or parafilm is needed to switch between the two modes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these tubes be used in a centrifuge, and will the round bottom hold up?\u003c\/strong\u003e\u003cbr\u003eThe PPC construction provides the flexibility and impact resistance needed for routine centrifugation. The round bottom concentrates pellets at a single focal point, which simplifies aspiration of supernatant and resuspension of cell pellets. Always verify your centrifuge rotor's tube-diameter and g-force ratings against the 17 × 100 mm format before use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these tubes compatible with CAP- and CLIA-regulated laboratories?\u003c\/strong\u003e\u003cbr\u003eThe ISO-certified manufacturing process and individual lot traceability make these tubes suitable for accredited clinical environments. Lot numbers are available for documentation in quality management systems supporting CAP, CLIA, and ISO 15189 compliance.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"16 mL Round-Bottom Test Tubes with Two-Position Snap Caps, PPC, Natural, Sterile, 1\/Individually Packed\",\"sku\":\"222239408IE1\",\"mpn\":\"222-2394-08I\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene Copolymer (PPC)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"231.82\",\"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 tubes sterile, and does individual packaging preserve that sterility?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — each tube is sterilized and sealed in individual packaging at the factory. 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