{"product_id":"round-bottom-test-tubes-5-0ml-12-x-75mm-snap-cap-ppc-2222376080e1","title":"5.0 mL Test Tubes, Round Bottom, PPC, Natural — 222-2376-080 | 25\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e5.0 mL Round Bottom Test Tubes with Two-Position Snap Caps — PPC, Natural, Sterile, 25\/Bag\u003c\/h2\u003e\n\u003cp\u003eThese 5.0 mL round bottom test tubes measure 12 × 75 mm and are constructed from virgin-grade Polypropylene Copolymer (PPC) in a natural (translucent) finish, supplied sterile and unassembled in 25\/Bag packaging. The round bottom geometry concentrates cell pellets and precipitates at the tube base for efficient resuspension and aspiration after centrifugation. Each tube is paired with a two-position snap cap that toggles between a vented configuration for gas exchange during incubation and a fully sealed position for containment during transport or storage.\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\u003e222-2376-080\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e5.0 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e12 × 75 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\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003eUnassembled (tubes and caps packaged separately)\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\u003e25\/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\u003eFlow cytometry and FACS analysis — the standard 12 × 75 mm round bottom format is compatible with most cytometer sample introduction systems\u003c\/li\u003e\n\u003cli\u003eImmunofluorescence staining protocols requiring multiple wash and resuspension steps\u003c\/li\u003e\n\u003cli\u003eCell sorting and pelleting — round bottom concentrates cells at a single point for complete, low-loss resuspension\u003c\/li\u003e\n\u003cli\u003eHematology sample preparation at the 5.0 mL working volume\u003c\/li\u003e\n\u003cli\u003eSerological testing and agglutination assays where round bottom format is required for reading precipitate patterns\u003c\/li\u003e\n\u003cli\u003eSpecimen collection and general laboratory sample handling where sterile, sealed packaging is required at point of receipt\u003c\/li\u003e\n\u003cli\u003eFreeze-thaw cycling applications — PPC flexibility and impact resistance reduce cracking under thermal stress\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 — limited resistance\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 at Caplugs® Evergreen ISO-certified manufacturing facilities using domestically sourced, FDA-registered virgin-grade PPC resin, these tubes are free of BPA and phthalates. Lot-level quality controls ensure consistent tube geometry, wall thickness, and dimensional uniformity across every bag, supporting compliance in CAP-, CLIA-, and ISO 15189-accredited laboratories. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with tiered volume pricing available for institutional, hospital, and grant-funded procurement programs.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these tubes supplied already assembled with the snap caps attached?\u003c\/strong\u003e\u003cbr\u003eNo — part number 222-2376-080 is supplied unassembled, meaning tubes and snap caps are packaged separately within the bag. This preserves sterility and allows users to assemble each tube immediately before use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat does the two-position snap cap do, and when would I use each position?\u003c\/strong\u003e\u003cbr\u003eThe snap cap has two distinct locked positions: a vented position that allows gas exchange — useful during cell incubation steps — and a fully sealed position that provides containment for centrifugation, transport, or storage. Switching between positions requires a simple push of the cap.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these tubes compatible with standard flow cytometry instruments?\u003c\/strong\u003e\u003cbr\u003eYes. The 12 × 75 mm round bottom format is the widely accepted standard for flow cytometry sample introduction and is compatible with most cytometer sample probes and carousel-style autosampler systems. Confirm your instrument's tube diameter specification before ordering in high volume.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these tubes withstand freeze-thaw cycling and centrifugation?\u003c\/strong\u003e\u003cbr\u003ePolypropylene Copolymer (PPC) offers greater flexibility and impact resistance than standard homopolymer polypropylene, making these tubes well suited for centrifugation and repeated freeze-thaw cycles. Always confirm your centrifuge manufacturer's tube-compatibility ratings before use at high g-forces.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"5.0 mL Round Bottom Test Tubes with Two-Position Snap Caps, PPC, Natural, Sterile, 25\/Bag\",\"sku\":\"2222376080E1\",\"mpn\":\"222-2376-080\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene Copolymer (PPC)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"103.70\",\"availability\":\"https:\/\/schema.org\/InStock\"}}\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Are these tubes supplied already assembled with the snap caps attached?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — these tubes are supplied unassembled, meaning tubes and snap caps are packaged separately within the bag. This preserves sterility and allows users to assemble each tube immediately before use.\"}},{\"@type\":\"Question\",\"name\":\"What does the two-position snap cap do, and when would I use each position?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The snap cap has two distinct locked positions: a vented position that allows gas exchange during cell incubation steps, and a fully sealed position for containment during centrifugation, transport, or storage.\"}},{\"@type\":\"Question\",\"name\":\"Are these tubes compatible with standard flow cytometry instruments?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The 12 × 75 mm round bottom format is the widely accepted standard for flow cytometry sample introduction and is compatible with most cytometer sample probes and carousel-style autosampler systems. 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