{"product_id":"mst-cryogenic-freestanding-tubes-1-5ml-graduated-ppc-2203949pr080e1","title":"1.5 mL Racks, Freestanding, PPC, Natural — 220-3949-PR080 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e1.5 mL Freestanding Cryogenic Tubes — MST™, PPC, Natural with Printed Graduations (220-3949-PR080)\u003c\/h2\u003e\n\u003cp\u003eThese 1.5 mL freestanding flat-bottom cryogenic tubes are constructed from polypropylene copolymer (PPC) — a material that retains flexibility and crack resistance at cryogenic temperatures where standard polypropylene homopolymer becomes brittle — making them suitable for liquid nitrogen (LN₂, −196 °C), vapor-phase nitrogen, and −80 °C ultra-low temperature (ULT) freezer storage. Printed graduation markings allow direct volume monitoring during sample addition and aliquoting, and the flat-bottom design lets tubes stand upright on the bench without a rack. Supplied non-sterile in sealed 1000\/Bag packaging, part number 220-3949-PR080 is a straightforward choice for high-throughput biobanking and cryopreservation 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-PR080\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 Series\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\u003eGraduations\u003c\/td\u003e\n\u003ctd\u003ePrinted\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\u003eBPA \/ Phthalate Free\u003c\/td\u003e\n\u003ctd\u003eYes\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 biospecimen archiving in LN₂ or vapor-phase nitrogen dewars\u003c\/li\u003e\n\u003cli\u003eCell line and primary cell cryopreservation at −80 °C and below\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 research use\u003c\/li\u003e\n\u003cli\u003eTissue sample archiving in ultra-low temperature freezers\u003c\/li\u003e\n\u003cli\u003eDry ice shipment of cryogenic samples\u003c\/li\u003e\n\u003cli\u003eVolume monitoring during aliquoting, with printed graduations visible without removing tubes from storage\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 solvents (toluene, xylene, etc.)\u003c\/td\u003e\n\u003ctd\u003eUse with caution — 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 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 and supports lot traceability requirements in regulated laboratory environments. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with tiered pricing available for institutional, biobank, and grant-funded accounts.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these tubes rated for liquid nitrogen immersion, or only vapor-phase storage?\u003c\/strong\u003e\u003cbr\u003eThese MST™ cryogenic tubes are rated for both direct liquid nitrogen immersion (−196 °C) and vapor-phase nitrogen storage, as well as −80 °C ULT freezers and dry ice shipment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy is PPC used instead of standard polypropylene?\u003c\/strong\u003e\u003cbr\u003ePolypropylene copolymer (PPC) retains flexibility and impact resistance at cryogenic temperatures, whereas standard PP homopolymer can become brittle below approximately −40 °C and risk cracking during freeze-thaw cycles or when handled cold.\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 graduations are designed to withstand cryogenic temperatures and repeated freeze-thaw cycles, maintaining legibility through long-term storage applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these tubes supplied sterile?\u003c\/strong\u003e\u003cbr\u003eNo — the 220-3949-PR080 tubes are supplied non-sterile in 1000\/Bag packaging. If your application requires sterile cryogenic tubes, contact LabSupplies.com to discuss alternative Caplugs® Evergreen options.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"1.5 mL Freestanding Cryogenic Tubes, MST™ PPC, Natural, Printed Graduations — 1000\/Bag\",\"sku\":\"2203949PR080E1\",\"mpn\":\"220-3949-PR080\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene Copolymer (PPC)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"203.12\",\"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 tubes rated for liquid nitrogen immersion, or only vapor-phase storage?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These MST™ cryogenic tubes are rated for both direct liquid nitrogen immersion (−196 °C) and vapor-phase nitrogen storage, as well as −80 °C ULT freezers and dry ice shipment.\"}},{\"@type\":\"Question\",\"name\":\"Why is PPC used instead of standard polypropylene?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Polypropylene copolymer (PPC) retains flexibility and impact resistance at cryogenic temperatures, whereas standard PP homopolymer can become brittle below approximately −40 °C and risk cracking during freeze-thaw cycles or when handled cold.\"}},{\"@type\":\"Question\",\"name\":\"Do the printed graduations remain legible after repeated freeze-thaw cycles?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — the printed graduations are designed to withstand cryogenic temperatures and repeated freeze-thaw cycles, maintaining legibility through long-term storage applications.\"}},{\"@type\":\"Question\",\"name\":\"Are these tubes supplied sterile?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — these tubes are supplied non-sterile in 1000\/Bag packaging. 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