{"product_id":"mst-cryogenic-freestanding-tubes-flat-top-printed-grad-2-0ml-ppc-2223953prf085e1","title":"2.0 mL Storage Boxes, Screw Caps, PPC, Natural — 222-3953-PRF085 | 50\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e2.0 mL Cryogenic Freestanding Tubes with Flat Top Natural Screw Cap — MST™ PPC, Sterile, 50\/Bag\u003c\/h2\u003e\n\u003cp\u003eThese Caplugs® Evergreen MST™ 2.0 mL cryogenic freestanding tubes (222-3953-PRF085) are manufactured from polypropylene copolymer (PPC) and supplied sterile, pre-assembled with flat top natural screw caps, 50 tubes per bag. The freestanding flat base provides upright stability without a rack, while the flat top cap surface accommodates 2D barcode labels and direct cryomarker writing for automated specimen tracking — making these tubes well suited to high-throughput biobank and clinical repository workflows. Rated to −196°C, they are engineered to withstand liquid nitrogen immersion, −80°C ULT freezer storage, and repeated freeze-thaw cycling without vial failure or cap loosening.\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-PRF085\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 Style\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 (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\u003eSterility\u003c\/td\u003e\n\u003ctd\u003eSterile\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\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 and clinical specimen archiving at liquid nitrogen (−196°C) or −80°C ULT freezer temperatures\u003c\/li\u003e\n\u003cli\u003eCell line cryopreservation requiring reliable screw-cap closure through freeze-thaw cycling\u003c\/li\u003e\n\u003cli\u003eLong-term nucleic acid (DNA\/RNA) storage where sample integrity and sterility are critical\u003c\/li\u003e\n\u003cli\u003ePlasma and serum cryogenic storage for clinical and translational research pipelines\u003c\/li\u003e\n\u003cli\u003eAutomated specimen tracking workflows using 2D barcode scanning from the top of the tube without removing tubes from storage boxes or racks\u003c\/li\u003e\n\u003cli\u003eHigh-density cryogenic storage box stacking enabled by the freestanding flat-base geometry\u003c\/li\u003e\n\u003cli\u003eCAP-, CLIA-, and ISO 15189-compliant 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\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\u003eLimited — 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, these MST™ cryogenic tubes are produced at ISO-certified manufacturing facilities from BPA-free, phthalate-free polypropylene copolymer resin. Pre-assembled and supplied sterile, each bag arrives ready for immediate use, eliminating manual assembly steps and reducing contamination risk. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with tiered volume pricing available for biobank programs, hospital systems, and grant-funded research institutions.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these tubes sterile out of the bag?\u003c\/strong\u003e\u003cbr\u003eYes — each tube and flat top screw cap arrives pre-assembled and sterile, so no additional sterilization step is required before use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these tubes be submerged directly in liquid nitrogen?\u003c\/strong\u003e\u003cbr\u003eYes. The PPC material and screw-cap design are rated to −196°C, making these tubes suitable for both vapor-phase and liquid-phase liquid nitrogen storage, as well as −80°C ULT freezers and repeated freeze-thaw cycling.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes the flat top cap support 2D barcode scanning?\u003c\/strong\u003e\u003cbr\u003eYes. The flat top surface is specifically designed to accept 2D barcode labels and direct cryomarker writing, enabling automated top-read tracking systems to identify tubes without removing them from storage boxes or racks.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo these tubes require a rack to stand upright?\u003c\/strong\u003e\u003cbr\u003eNo. The freestanding flat-base design allows the tubes to stand independently on any flat surface, simplifying bench handling during aliquoting or retrieval from storage boxes.\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\":\"2223953PRF085E1\",\"mpn\":\"222-3953-PRF085\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene Copolymer (PPC)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"188.23\",\"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 tubes sterile out of the bag?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — each tube and flat top screw cap arrives pre-assembled and sterile, so no additional sterilization step is required before use.\"}},{\"@type\":\"Question\",\"name\":\"Can these tubes be submerged directly in liquid nitrogen?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The PPC material and screw-cap design are rated to −196°C, making these tubes suitable for both vapor-phase and liquid-phase liquid nitrogen storage, as well as −80°C ULT freezers and repeated freeze-thaw cycling.\"}},{\"@type\":\"Question\",\"name\":\"Does the flat top cap support 2D barcode scanning?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. 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