{"product_id":"conical-bottom-test-tubes-4-5ml-12-75mm-red-pp-2142355r30e1","title":"4.5 mL Centrifuge Tubes, Conical Bottom, PP, Red — 214-2355-R30 | 250\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e4.5 mL Conical Bottom Centrifuge Tubes, Polypropylene, Red — 250\/Bag (214-2355-R30)\u003c\/h2\u003e\n\u003cp\u003eThese 4.5 mL conical bottom tubes measure 12 × 75 mm and are molded from virgin-grade polypropylene (PP), making them well suited for clinical centrifugation, urinalysis sediment concentration, and toxicology sample preparation. Supplied non-sterile in sealed 250\/Bag packaging, the red color provides immediate rack-position identification in high-throughput laboratory workflows. Lot-to-lot dimensional consistency ensures reliable fit in standard 12 mm centrifuge tube holders, batch after batch.\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\u003e214-2355-R30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e4.5 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\u003eConical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolypropylene (PP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eRed\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\u003e250\/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\u003eClinical hematology — differential cell counts and pellet concentration using the conical geometry to minimize pellet disturbance during aspiration\u003c\/li\u003e\n\u003cli\u003eUrinalysis sediment analysis — conical bottom consolidates cellular and particulate sediment at the tube tip for efficient microscopic examination\u003c\/li\u003e\n\u003cli\u003eToxicology sample preparation — clean phase separation in aqueous and dilute-reagent matrices\u003c\/li\u003e\n\u003cli\u003eGeneral centrifuge pelleting — compatible with standard 12 mm clinical centrifuge tube holders\u003c\/li\u003e\n\u003cli\u003eColor-coded rack organization — red coloring supports visual sample-type or workflow-stage identification in high-throughput settings\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\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 from FDA-compliant, BPA-free, phthalate-free virgin-grade polypropylene, these tubes are produced at Caplugs® Evergreen ISO-certified manufacturing facilities with tight controls on wall thickness, outer diameter, and length tolerance. Each bag carries a lot number and manufacturing date to support full traceability under CAP, CLIA, and ISO 15189 quality programs. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, so labs avoid offshore lead-time variability and can depend on consistent domestic supply for high-volume clinical operations.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these tubes sterile?\u003c\/strong\u003e\u003cbr\u003eNo — the 214-2355-R30 tubes are supplied non-sterile. For applications requiring sterility, contact us about sterile alternatives in the Caplugs® Evergreen catalog.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill these tubes fit standard clinical centrifuge racks?\u003c\/strong\u003e\u003cbr\u003eYes. The 12 × 75 mm outer dimensions are compatible with standard 12 mm clinical centrifuge tube holders commonly found in hematology and urinalysis workflows.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre the tubes safe for direct contact with serum, plasma, and urine?\u003c\/strong\u003e\u003cbr\u003eYes. They are molded from virgin-grade polypropylene resin that is BPA-free and phthalate-free, making them appropriate for direct contact with serum, plasma, urine, and standard aqueous clinical matrices.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat lot traceability documentation is available?\u003c\/strong\u003e\u003cbr\u003eEach bag is labeled with a lot number and manufacturing date, providing the documentation needed for CAP, CLIA, and ISO 15189 accreditation recordkeeping.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"4.5 mL Conical Bottom Centrifuge Tubes, Polypropylene, Red — 250\/Bag\",\"sku\":\"2142355R30E1\",\"mpn\":\"214-2355-R30\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene (PP)\",\"color\":\"Red\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"84.11\",\"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?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — the tubes are supplied non-sterile. For applications requiring sterility, contact us about sterile alternatives in the Caplugs® Evergreen catalog.\"}},{\"@type\":\"Question\",\"name\":\"Will these tubes fit standard clinical centrifuge racks?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The 12 × 75 mm outer dimensions are compatible with standard 12 mm clinical centrifuge tube holders commonly found in hematology and urinalysis workflows.\"}},{\"@type\":\"Question\",\"name\":\"Are the tubes safe for direct contact with serum, plasma, and urine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. 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