{"product_id":"conical-bottom-test-tubes-4-5ml-12-75mm-blue-pp-2142355b30e1","title":"4.5 mL Centrifuge Tubes, Conical Bottom, PP, Blue — 214-2355-B30 | 250\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e4.5 mL Conical Bottom Centrifuge Tubes — Polypropylene, Blue, 12 × 75 mm (214-2355-B30) | 250\/Bag\u003c\/h2\u003e\n\u003cp\u003eThese 4.5 mL conical bottom centrifuge tubes measure 12 × 75 mm and are molded from virgin-grade polypropylene (PP) for reliable performance across clinical and research centrifugation workflows. Supplied non-sterile in sealed 250\/Bag packaging, they are well suited for hematology, toxicology sample preparation, urinalysis sediment analysis, and any application requiring efficient pellet concentration at the tube tip. The blue color provides at-a-glance rack identification in high-throughput laboratory settings.\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-B30\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\u003eBlue\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 conical pellet concentration after centrifugation\u003c\/li\u003e\n\u003cli\u003eToxicology sample preparation: clean phase separation with minimal carry-over\u003c\/li\u003e\n\u003cli\u003eUrinalysis: sediment analysis using conical bottom geometry to concentrate cellular and particulate material\u003c\/li\u003e\n\u003cli\u003eGeneral centrifuge pelleting: complete aspirate recovery with minimal pellet disturbance\u003c\/li\u003e\n\u003cli\u003eColor-coded sample rack organization in high-throughput clinical and CAP\/CLIA\/ISO 15189-accredited laboratory workflows\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe 12 × 75 mm outer diameter of these tubes is compatible with standard 12 mm clinical centrifuge tube holders, making them a practical choice for laboratories already using this format. Lot-to-lot dimensional consistency—including controlled wall thickness, outer diameter, and length tolerances—ensures a reliable fit across centrifuge rotors and tube racks designed for the 12 mm format. Every bag ships with a lot number and manufacturing date to support full traceability in CAP-, CLIA-, and ISO 15189-accredited settings.\u003c\/p\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, these Caplugs® Evergreen tubes are produced at ISO-certified facilities from FDA-compliant, virgin-grade polypropylene that is BPA-free, phthalate-free, and latex-free. Sealed 250\/Bag packaging preserves product integrity from warehouse receipt through point of use, and each bag carries full lot and manufacturing date information for regulatory traceability. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from domestic USA inventory, with tiered volume pricing available for high-use clinical labs, hospitals, and research institutions.\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. For applications requiring sterility, confirm that your workflow includes a validated sterilization step or contact us about sterile packaging options.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat centrifuge rotor formats accept the 12 × 75 mm tube size?\u003c\/strong\u003e\u003cbr\u003eThe 12 × 75 mm outer diameter is compatible with standard 12 mm clinical centrifuge tube holders. Always verify rotor and tube holder specifications against your instrument's documentation before use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these tubes safe for direct contact with serum, plasma, and urine?\u003c\/strong\u003e\u003cbr\u003eYes — they are molded from virgin-grade, FDA-compliant polypropylene that is BPA-free and phthalate-free, making them suitable for direct contact with serum, plasma, urine, and standard aqueous clinical reagent matrices.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these tubes be autoclaved?\u003c\/strong\u003e\u003cbr\u003ePolypropylene is generally autoclavable; however, these tubes are supplied non-sterile and are not validated for autoclave sterilization by the manufacturer. Consult your laboratory's SOP before autoclaving.\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, Blue, 12 × 75 mm — 250\/Bag\",\"sku\":\"2142355B30E1\",\"mpn\":\"214-2355-B30\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene (PP)\",\"color\":\"Blue\",\"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 centrifuge tubes sterile?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — they are supplied non-sterile. 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