{"product_id":"mst-cryogenic-freestanding-tubes-1-5ml-ppc-2203949080e1","title":"1.5 mL Racks, Freestanding, PPC, Natural — 220-3949-080 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e1.5 mL Freestanding Flat-Bottom Cryogenic Tubes — PPC, Natural, Non-Sterile (220-3949-080)\u003c\/h2\u003e\n\u003cp\u003eThese 1.5 mL MST™ cryogenic tubes from Caplugs® Evergreen feature a freestanding flat-bottom design and are molded from polypropylene copolymer (PPC) — a material specifically chosen for its flexibility and crack resistance at temperatures as low as -196°C, where standard PP homopolymer becomes brittle. Supplied non-sterile in bulk (1000\/Bag), part number 220-3949-080 is engineered for liquid nitrogen, vapor-phase nitrogen, -80°C ULT freezer, and dry ice transport applications across biobanking, clinical, and research workflows.\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\u003e220-3949-080\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e1.5 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Type\u003c\/td\u003e\n\u003ctd\u003eMST™ Cryogenic Freestanding Tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBottom Style\u003c\/td\u003e\n\u003ctd\u003eFlat Bottom (Freestanding)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCap Style\u003c\/td\u003e\n\u003ctd\u003eSnap Cap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCryogenic Rating\u003c\/td\u003e\n\u003ctd\u003eLN2 (-196°C) \/ Vapor-Phase Nitrogen \/ -80°C ULT\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\u003eNon-Sterile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e1000\/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\u003eBiobanking and long-term biospecimen archiving in liquid nitrogen (LN2) or vapor-phase nitrogen storage systems\u003c\/li\u003e\n\u003cli\u003eCell line cryopreservation and tissue sample archiving requiring reliable sealing at cryogenic temperatures\u003c\/li\u003e\n\u003cli\u003eDNA and RNA long-term cryogenic storage where tube integrity at -196°C is critical\u003c\/li\u003e\n\u003cli\u003eSerum and plasma aliquoting for clinical biospecimen programs under CAP, CLIA, or ISO 15189 quality frameworks\u003c\/li\u003e\n\u003cli\u003e-80°C ULT freezer storage of small-volume samples in high-density workflows\u003c\/li\u003e\n\u003cli\u003eDry ice shipment of cryogenic samples requiring a crack-resistant, freestanding tube format\u003c\/li\u003e\n\u003cli\u003eBench-top aliquoting and sample retrieval — the flat-bottom design allows upright placement without a tube rack\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 (toluene, xylene, etc.)\u003c\/td\u003e\n\u003ctd\u003eNot recommended — use with caution\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 facilities, these MST™ cryogenic tubes are produced from virgin-grade, FDA-registered PPC resin that is BPA-free and phthalate-free. Each bag ships with 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 stocking 220-3949-080 from domestic inventory, which eliminates offshore lead time risk and supports uninterrupted supply for high-volume biobanking and clinical programs. Tiered pricing is available for institutional, grant-funded, and high-volume procurement.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these cryogenic tubes sterile?\u003c\/strong\u003e\u003cbr\u003eNo — they are supplied non-sterile in 1000\/Bag bulk packaging. For workflows requiring sterility, consider gamma-irradiated alternatives; these tubes are intended for non-sterile cryogenic storage and aliquoting applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy is PPC used instead of standard polypropylene?\u003c\/strong\u003e\u003cbr\u003ePolypropylene homopolymer (PP) becomes brittle at temperatures below approximately -40°C, increasing the risk of cracking during LN2 immersion or dry ice transport. Polypropylene copolymer (PPC) retains flexibility and impact resistance across the full cryogenic range down to -196°C, making it the preferred material for long-term biospecimen storage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these tubes stand upright without a rack?\u003c\/strong\u003e\u003cbr\u003eYes — the flat-bottom freestanding design allows the tubes to stand upright on any bench surface, making them convenient for aliquoting, labeling, and sample retrieval without requiring a separate tube rack.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo these tubes come with lot traceability documentation for regulated labs?\u003c\/strong\u003e\u003cbr\u003eYes — each bag of 220-3949-080 ships with lot number and manufacturing date, providing the documentation needed to satisfy traceability requirements under CAP, CLIA, and ISO 15189 accreditation programs.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"1.5 mL Freestanding Flat-Bottom Cryogenic Tubes, MST™ — PPC, Natural, Non-Sterile, 1000\/Bag\",\"sku\":\"2203949080E1\",\"mpn\":\"220-3949-080\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene Copolymer (PPC)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"79.32\",\"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 cryogenic tubes sterile?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — they are supplied non-sterile in 1000\/Bag bulk packaging. For workflows requiring sterility, consider gamma-irradiated alternatives; these tubes are intended for non-sterile cryogenic storage and aliquoting applications.\"}},{\"@type\":\"Question\",\"name\":\"Why is PPC used instead of standard polypropylene?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Polypropylene homopolymer (PP) becomes brittle at temperatures below approximately -40°C, increasing the risk of cracking during LN2 immersion or dry ice transport. 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