{"product_id":"mst-cryogenic-freestanding-tubes-2-0ml-graduated-ppc-2203953pr080e1","title":"2.0 mL Racks, Freestanding, PPC, Natural — 220-3953-PR080 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e2.0 mL Freestanding Cryogenic Tubes — MST™ PPC, Natural, Printed Graduations (220-3953-PR080)\u003c\/h2\u003e\n\u003cp\u003eThese MST™ 2.0 mL freestanding flat-bottom cryogenic tubes are constructed from polypropylene copolymer (PPC) — a material that maintains flexibility and crack resistance at cryogenic temperatures where standard polypropylene homopolymer becomes brittle — and are rated for the full cryogenic range from −80 °C ULT freezers through liquid nitrogen storage at −196 °C. Printed graduation markings allow direct volume estimation during sample addition and aliquoting without removing the tube from storage, and the flat-bottom design lets tubes stand upright on the bench without a rack. Supplied non-sterile in a sealed 1000\/Bag pack, part number 220-3953-PR080 is well-suited to high-throughput biobanking, biospecimen archiving, and cell storage 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\u003e220-3953-PR080\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\u003eMST™ Cryogenic Freestanding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBottom Style\u003c\/td\u003e\n\u003ctd\u003eFlat Bottom\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\u003eGraduations\u003c\/td\u003e\n\u003ctd\u003ePrinted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCryogenic Rating\u003c\/td\u003e\n\u003ctd\u003eLN₂ (−196 °C) \/ Vapor-Phase N₂ \/ −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\u003eBPA \/ Phthalate Free\u003c\/td\u003e\n\u003ctd\u003eYes\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\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 cryogenic biospecimen archiving in LN₂ or vapor-phase nitrogen dewars\u003c\/li\u003e\n\u003cli\u003eCell line and primary cell cryopreservation in −80 °C ULT freezers\u003c\/li\u003e\n\u003cli\u003eDNA, RNA, and genomic library long-term cryogenic storage\u003c\/li\u003e\n\u003cli\u003eSerum and plasma aliquot cryopreservation for clinical and translational research\u003c\/li\u003e\n\u003cli\u003eTissue sample archiving and pathology specimen cryobanking\u003c\/li\u003e\n\u003cli\u003eDry ice shipment of cryogenic samples between facilities\u003c\/li\u003e\n\u003cli\u003eCAP\/CLIA and ISO 15189 workflows requiring lot-traceable 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 \/ chlorinated solvents\u003c\/td\u003e\n\u003ctd\u003eLimited — not recommended for prolonged contact\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 manufacturing facilities, these MST™ cryogenic tubes are produced from virgin-grade, FDA-registered PPC resin that is BPA-free and phthalate-free. The sealed 1000\/Bag format preserves product integrity from warehouse receipt through point-of-use. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with tiered volume pricing available for institutional purchasers, biobanks, and grant-funded laboratories.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these tubes rated for immersion in liquid nitrogen?\u003c\/strong\u003e\u003cbr\u003eYes — the PPC construction is rated for the full cryogenic range, including direct liquid nitrogen immersion at −196 °C and vapor-phase nitrogen storage, as well as −80 °C ULT freezer use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy use PPC instead of standard polypropylene for cryogenic storage?\u003c\/strong\u003e\u003cbr\u003ePolypropylene homopolymer becomes brittle and prone to cracking below approximately −40 °C. Polypropylene copolymer (PPC) retains flexibility and impact resistance at cryogenic temperatures, making it the appropriate material choice for LN₂ and ULT applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo the printed graduations remain legible after repeated freeze-thaw cycles?\u003c\/strong\u003e\u003cbr\u003eYes — the printed graduation markings are designed to withstand cryogenic temperatures and repeated freeze-thaw cycling, maintaining legibility through long-term biobank storage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these tubes supplied sterile?\u003c\/strong\u003e\u003cbr\u003eNo — they are supplied non-sterile in 1000\/Bag packaging. Laboratories requiring sterile cryogenic tubes should evaluate the appropriate sterile offering from the Caplugs® Evergreen MST™ line.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"MST™ 2.0 mL Freestanding Cryogenic Tubes, PPC, Natural, Printed Graduations — 1000\/Bag\",\"sku\":\"2203953PR080E1\",\"mpn\":\"220-3953-PR080\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene Copolymer (PPC)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"186.49\",\"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 rated for immersion in liquid nitrogen?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — the PPC construction is rated for the full cryogenic range, including direct liquid nitrogen immersion at −196 °C and vapor-phase nitrogen storage, as well as −80 °C ULT freezer use.\"}},{\"@type\":\"Question\",\"name\":\"Why use PPC instead of standard polypropylene for cryogenic storage?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Polypropylene homopolymer becomes brittle and prone to cracking below approximately −40 °C. 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