{"product_id":"mst-cryogenic-freestanding-tubes-flat-top-2-0ml-ppc-2223953f085e1","title":"2.0 mL Storage Boxes, Screw Caps, PPC, Natural — 222-3953-F085 | 50\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e2.0 mL Cryogenic Freestanding Tubes, Flat Top Natural Screw Cap — PPC, Sterile, 50\/Bag\u003c\/h2\u003e\n\u003cp\u003eThese MST™ 2.0 mL cryogenic freestanding tubes ship pre-assembled with flat top natural screw caps and are manufactured from polypropylene copolymer (PPC) for reliable performance from liquid nitrogen immersion at −196°C through −80°C ultra-low temperature freezer storage and repeated freeze-thaw cycling. The flat freestanding base provides upright stability without a rack, while the flat top cap surface accommodates 2D barcode labels and direct cryomarker writing for automated biobank specimen tracking. Available as part number 222-3953-F085, these tubes are supplied sterile in bags of 50.\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\u003e222-3953-F085\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e2.0 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Type\u003c\/td\u003e\n\u003ctd\u003eCryogenic Freestanding\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\u003eFlat Top Natural Screw Cap\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\u003eCryogenic Rating\u003c\/td\u003e\n\u003ctd\u003e−196°C (liquid nitrogen) to ambient\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\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003ePre-assembled (tube + cap)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e50\/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\u003eBiobank specimen archiving requiring upright freestanding storage in high-density cryogenic boxes\u003c\/li\u003e\n\u003cli\u003eCell line cryopreservation in liquid nitrogen vapor phase or immersion at −196°C\u003c\/li\u003e\n\u003cli\u003eLong-term nucleic acid (DNA\/RNA) storage at −80°C ultra-low temperature\u003c\/li\u003e\n\u003cli\u003ePlasma and serum cryogenic storage with repeated freeze-thaw cycling\u003c\/li\u003e\n\u003cli\u003eAutomated specimen tracking workflows using top-read 2D barcode scanners — the flat cap surface accepts printed labels or direct cryomarker writing without removing tubes from storage boxes\u003c\/li\u003e\n\u003cli\u003eCAP\/CLIA and ISO 15189 regulated laboratories requiring lot-traceable, sterile cryogenic consumables\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)\u003c\/td\u003e\n\u003ctd\u003eUse with caution — verify before use\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 ISO-certified manufacturing facilities, these Caplugs® Evergreen MST™ cryogenic tubes are produced from BPA-free, phthalate-free PPC resin and are supplied sterile for immediate use in regulated laboratory environments. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory, with volume and institutional pricing available for biobanks, hospital systems, and research institutions managing high-throughput cryogenic storage programs.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these cryogenic tubes safe for direct liquid nitrogen immersion?\u003c\/strong\u003e\u003cbr\u003eYes — the PPC material and threaded screw cap are rated to −196°C, making these tubes suitable for both liquid nitrogen vapor phase and immersion storage as well as −80°C ULT freezer use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo the tubes arrive pre-assembled with caps attached?\u003c\/strong\u003e\u003cbr\u003eYes — each bag of 50 contains tubes pre-assembled with the flat top natural screw cap, so they are ready for immediate labeling and sample loading without separate cap handling.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use automated 2D barcode readers with these tubes?\u003c\/strong\u003e\u003cbr\u003eThe flat top cap design provides a flat surface specifically suited for 2D barcode labels and top-read automated scanning systems, allowing tube identification without removing the tube from its storage box or rack.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these tubes compatible with standard cryogenic storage boxes?\u003c\/strong\u003e\u003cbr\u003eYes — the flat freestanding base allows the tubes to stand upright without a rack and fits standard cryogenic storage box formats used in biobank and research freezer workflows. Confirm box cell dimensions against the tube diameter before ordering in high volume.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"MST™ 2.0 mL Cryogenic Freestanding Tubes, Flat Top Natural Screw Cap — PPC, Sterile, 50\/Bag\",\"sku\":\"2223953F085E1\",\"mpn\":\"222-3953-F085\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene Copolymer (PPC)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"125.39\",\"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 safe for direct liquid nitrogen immersion?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — the PPC material and threaded screw cap are rated to −196°C, making these tubes suitable for both liquid nitrogen vapor phase and immersion storage as well as −80°C ULT freezer use.\"}},{\"@type\":\"Question\",\"name\":\"Do the tubes arrive pre-assembled with caps attached?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — each bag of 50 contains tubes pre-assembled with the flat top natural screw cap, so they are ready for immediate labeling and sample loading without separate cap handling.\"}},{\"@type\":\"Question\",\"name\":\"Can I use automated 2D barcode readers with these tubes?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The flat top cap design provides a flat surface specifically suited for 2D barcode labels and top-read automated scanning systems, allowing tube identification without removing the tube from its storage box or rack.\"}},{\"@type\":\"Question\",\"name\":\"Are these tubes compatible with standard cryogenic storage boxes?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — the flat freestanding base allows the tubes to stand upright without a rack and fits standard cryogenic storage box formats used in biobank and research freezer workflows. 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