{"product_id":"caplugs-214-3724-020-15ml-microcentrifuge-tube-natural","title":"1.5 mL Microcentrifuge Tubes, Conical Bottom, HDPE, Natural — 214-3724-020 | 1,000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e1.5 mL Conical-Bottom Microcentrifuge Tubes — HDPE, Natural, 1,000\/Bag (214-3724-020)\u003c\/h2\u003e\n\u003cp\u003eThese 1.5 mL conical-bottom microcentrifuge tubes are precision-molded from virgin High-Density Polyethylene (HDPE) to deliver consistent wall thickness, reliable cap-thread tolerance, and broad chemical resistance across clinical, research, and industrial laboratory workflows. The conical bottom geometry minimizes dead-volume loss and ensures complete pellet recovery — a decisive advantage in DNA\/RNA isolation, protein precipitation, and cell harvest protocols where every microliter of sample matters. Supplied non-sterile in a sealed bulk bag of 1,000, the tubes arrive clean and ready for immediate use from stockroom to bench.\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\u003e214-3724-020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e1.5 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBottom Geometry\u003c\/td\u003e\n\u003ctd\u003eConical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube OD\u003c\/td\u003e\n\u003ctd\u003e11 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eNatural (semi-opaque)\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\u003e1,000\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBPA \/ Phthalates\u003c\/td\u003e\n\u003ctd\u003eBPA-free; no phthalate plasticizers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA (California)\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\u003eDNA and RNA isolation: conical bottom enables complete pellet recovery after precipitation or spin-column extraction\u003c\/li\u003e\n\u003cli\u003eProtein precipitation and enzyme assay preparation requiring minimal dead-volume loss\u003c\/li\u003e\n\u003cli\u003eCell harvest and culture supernatant collection via standard microcentrifuge protocols\u003c\/li\u003e\n\u003cli\u003ePCR and qPCR sample preparation — reagent aliquoting and template dilution series\u003c\/li\u003e\n\u003cli\u003eShort- and long-term sample storage of buffers, serum, plasma, and biological specimens\u003c\/li\u003e\n\u003cli\u003eHigh-throughput clinical and genomics workflows where bulk, cost-effective consumables reduce per-sample costs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWith a standard 11 mm OD, these tubes fit the 1.5\/1.8\/2.0 mL rotor positions found on the most widely deployed benchtop microcentrifuges. Confirmed compatible platforms include Eppendorf® Centrifuge 5415D, 5415R, 5424, 5424R, and MiniSpin®; Thermo Fisher Sorvall™ Legend Micro 17\/21 and Heraeus® Pico 17\/21; VWR®\/Avantor Galaxy 16DH and Galaxy 16 standard 24-position fixed-angle rotors; Labnet® Prism™ R Refrigerated Microcentrifuge (C2500-R) in all rotor configurations accepting the 1.5\/2.0 mL format; and Sigma\/Sartorius 1-15K, 1-16K, and 3-18KS microcentrifuges in both swing-bucket and fixed-angle configurations. Always verify your specific rotor's tube-position OD specification before substituting any consumable.\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 and saline\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilute acids and bases\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShort-chain alcohols (ethanol, isopropanol)\u003c\/td\u003e\n\u003ctd\u003eGood — suitable for standard precipitation workflows\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMany organic solvents (hexane, DMSO at low concentrations)\u003c\/td\u003e\n\u003ctd\u003eGood — verify contact time for extended exposures\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChlorinated solvents (chloroform, methylene chloride)\u003c\/td\u003e\n\u003ctd\u003eNot recommended — use PP or glass alternatives\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStrong oxidizing acids (concentrated H₂SO₄, HNO₃)\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 a California manufacturing facility, Caplugs® Evergreen microcentrifuge tubes are molded from virgin HDPE resin — no regrind, no leachable surface coatings — and are free of BPA and phthalate plasticizers. The semi-opaque natural finish allows visual sample monitoring without the extractable concerns associated with colored pigment systems. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory, with tiered volume pricing available for high-throughput laboratories, hospitals, and institutions purchasing on blanket orders or grants. The sealed bulk-bag format of 1,000 tubes maintains cleanliness through storage and eliminates secondary packaging waste at point of use.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these microcentrifuge tubes sterile?\u003c\/strong\u003e\u003cbr\u003eNo — part number 214-3724-020 is supplied non-sterile. For applications requiring sterility assurance, additional decontamination steps should be incorporated into your sample preparation SOP.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan HDPE microcentrifuge tubes be autoclaved?\u003c\/strong\u003e\u003cbr\u003eHDPE is generally not recommended for autoclave sterilization. The high heat and steam pressure of standard autoclave cycles can distort the tube geometry and compromise cap-thread integrity. If autoclavable tubes are required, polypropylene (PP) alternatives are the appropriate material choice.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill these tubes fit my Eppendorf centrifuge rotor?\u003c\/strong\u003e\u003cbr\u003eYes — the standard 11 mm OD is compatible with Eppendorf 5415D, 5415R, 5424, 5424R, and MiniSpin rotor positions designed for the 1.5\/1.8\/2.0 mL tube format. Always confirm your specific rotor's dimensional specifications if you are switching from OEM or previously qualified consumables.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between these HDPE tubes and polypropylene microcentrifuge tubes?\u003c\/strong\u003e\u003cbr\u003eHDPE offers excellent rigidity and broad chemical resistance to aqueous buffers and many organics, making it well suited for storage and general centrifugation. Polypropylene is the preferred choice when autoclave sterilization or higher-temperature centrifugation is required. Both materials are BPA-free and phthalate-free in the Caplugs® Evergreen portfolio.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"1.5 mL Conical-Bottom Microcentrifuge Tubes, HDPE, Natural, 1,000\/Bag — Caplugs® Evergreen 214-3724-020\",\"sku\":\"214-3724-020\",\"mpn\":\"214-3724-020\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"High-Density Polyethylene (HDPE)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"58.58\",\"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 microcentrifuge tubes sterile?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — part number 214-3724-020 is supplied non-sterile. 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