Sorenson BioScience SafeSeal™ 39640T | 1.7mL Low Binding Microcentrifuge Tube, Natural, Non-Sterile — 250/Pack, 2500/Case

The Sorenson BioScience SafeSeal™ 39640T is a 1.7mL low binding natural polypropylene microcentrifuge tube — combining the industry-proven SafeSeal™ positive seal design with a surface-modified low binding interior that minimizes adhesion of nucleic acids, proteins, and enzymes to the tube wall for maximum sample recovery. Natural, polypropylene, low binding. Non-sterile, bulk pack (box), 250 tubes per pack, 10 packs per case. SafeSeal Microcentrifuge Tubes from Sorenson BioScience are ideal for high-speed centrifugation, rated up to 25,000 x g. A positive seal design allows repeated cap closures and will not pop during boiling or freezing. Tubes feature external graduation marks and frosted writing surfaces — fit all standard rotors — are autoclavable — and are rated from -80°C to 121°C. Certified free of RNase/DNase, Human DNA, Pyrogens and PCR Inhibitors.

Low Binding Surface — Maximum Recovery of Precious Samples The defining feature of the 39640T is its low binding polypropylene surface — a surface-modified tube interior that dramatically reduces non-specific adhesion of nucleic acids, proteins, peptides, enzymes, and other biomolecules to the tube wall. At 1.7mL scale, even a thin film of liquid retained on the inner tube surface after centrifugation represents a meaningful percentage of the total sample volume — directly affecting quantification accuracy, assay sensitivity, and the yield of precious low-abundance samples. The low binding surface of the 39640T maximizes delivered sample volume from every centrifugation, pipetting, and transfer step — making it the preferred tube for RNA isolation, protein assays, enzyme storage, dilution series of rare samples, and any workflow where maximum recovery is critical.

39640T vs. Standard SafeSeal MCT — Choosing Between Low Binding and Standard: The 39640T is the low binding variant of the Sorenson 1.7mL SafeSeal™ tube family. Understanding when to choose low binding vs. standard polypropylene is essential for optimal results:

SafeSeal™ Positive Seal Design — No Popping During Boiling or Freezing Positive seal design allows for repeated cap closures and eliminates pressure induced popping of caps. The SafeSeal™ cap mechanism creates a positive mechanical engagement between cap and tube — maintaining a secure, leak-proof seal during high-speed centrifugation, vortexing, boiling, freeze-thaw cycling, and transport. The positive seal design specifically addresses one of the most common and frustrating failures in standard microcentrifuge tube use — pressure-induced cap popping during boiling or autoclaving, which can cause sample loss, cross-contamination, and biosafety hazards.

25,000 × g RCF Rating — High-Speed Centrifugation Performance Superior strength — RCF rating of 25,000 x g. The 39640T is rated to 25,000 × g — well above the maximum speed of standard laboratory microcentrifuges (typically 16,000–21,000 × g) — providing a meaningful safety margin across all high-speed centrifugation protocols. The robust polypropylene construction maintains tube geometry and cap seal integrity even at maximum rated centrifugal force.

-80°C to 121°C Temperature Range — From Freezer to Autoclave Temperature rating from -80°C to 121°C. The wide temperature range of the 39640T covers every laboratory temperature condition from ultra-low temperature sample storage at -80°C through room temperature processing, 37°C and 65°C incubation, boiling, and autoclave sterilization at 121°C — all in a single tube format.

Autoclavable — Reusable Under Sterile Conditions Autoclavable. The polypropylene construction and SafeSeal™ cap both withstand autoclave sterilization at 121°C — allowing the 39640T to be re-sterilized for regulated or aseptic applications where non-sterile tubes must be sterilized before use.

External Graduation Marks and Frosted Writing Surface Tubes feature external graduation marks and frosted writing surfaces. External graduation marks allow visual volume confirmation without removing the tube from the rack or centrifuge rotor — and the frosted writing surface provides a dedicated labeling area for permanent marker, pencil, or cryogenic label adhesives on every tube.

Fits All Standard Rotors Fit all standard rotors. The standard 1.7mL microcentrifuge tube geometry of the 39640T ensures compatibility with all standard microcentrifuge rotors from all major centrifuge manufacturers — no adapters or rotor modifications required.

Full Molecular Biology Certification — Comprehensive Purity Panel Certified RNase/DNase Free. Certified Human DNA Free. Certified PCR Inhibitor Free. Certified Pyrogen Free. The complete four-certification purity panel qualifies the 39640T for the most demanding molecular biology applications including RNA isolation, PCR setup, qPCR, DNA sequencing, protein assays, and any workflow where tube material contamination could affect results.

Non-Sterile — 250 Tubes per Pack, 2500 per Case Non-sterile, bulk pack (box), 250 tubes per pack, 10 packs per case. The 39640T is supplied non-sterile in convenient bulk pack format — 250 tubes per box, 10 boxes per case, 2500 tubes per case. For applications requiring sterile low binding tubes, the sterile version is available separately.

Compatible Replacement — Cross-Reference Guide

The Sorenson BioScience SafeSeal™ 39640T is a direct compatible replacement for low binding 1.7mL microcentrifuge tubes from several major manufacturers:

• Eppendorf® 0030108051 — Eppendorf LoBind Tube 1.5mL, non-sterile
• USA Scientific 1415-2600 — 1.7mL low binding microcentrifuge tube, natural
• Thermo Fisher 3451 — 1.7mL low binding microcentrifuge tube, natural

Competitor brand names and catalog numbers are referenced for cross-referencing purposes only. Compatibility should be verified for your specific application and protocol.

Complete Sorenson BioScience SafeSeal™ 1.7mL MCT Family:

Key Features

• 1.7mL low binding polypropylene microcentrifuge tube
• Low binding surface modification — maximizes recovery of nucleic acids, proteins, and enzymes
• SafeSeal™ positive seal design — cap will not pop during boiling or freezing
• 25,000 × g RCF rating — high-speed centrifugation
• Temperature range: -80°C to 121°C
• Autoclavable at 121°C
• Fits all standard microcentrifuge rotors
• External graduation marks — visual volume confirmation
• Frosted writing surface — permanent marker, pencil, and label compatible
• Natural (clear) color
• Certified RNase-free and DNase-free
• Certified Human DNA-free
• Certified PCR Inhibitor-free
• Certified Pyrogen-free
• Non-sterile
• Bulk pack — 250 tubes per pack / 2,500 tubes per case

Supported Applications RNA isolation and quantification, protein and enzyme storage and dilution, low-abundance sample processing, PCR and qPCR reagent preparation, DNA quantification and normalization, next-generation sequencing library preparation, dilution series of precious samples, biomarker quantification, immunoprecipitation, ChIP, CLIP, and any molecular biology application requiring a 1.7mL microcentrifuge tube with minimum non-specific sample binding and maximum recovery.

Technical Specifications