Cryogenic Tube[2]
Overview
Cryogenic tubes are specialized containers used in laboratories to store biological samples such as DNA, cells, and tissues at extremely low temperatures, typically in liquid nitrogen (-196°C) or ultra-low freezers (-80°C). They are engineered to withstand thermal shocks and prevent sample contamination or evaporation. These tubes are indispensable in fields like genomics, biobanking, and vaccine development, where long-term sample preservation is critical. Their standardized designs ensure compatibility with automated systems and racks, streamlining laboratory workflows.
Structure and Working Principle
A cryogenic tube consists of a cylindrical body with a screw or snap cap, often featuring an O-ring seal to prevent leaks. The tubes are made from materials like polypropylene, which remains flexible and crack-resistant at ultra-low temperatures. The working principle relies on the material's ability to maintain structural integrity under extreme conditions. Some tubes include internal threads or external labeling areas for tracking. High-quality tubes undergo rigorous testing for sterility and durability to ensure reliable performance.
Key Features
Leak-proof designs are paramount, often achieved through threaded caps with silicone gaskets. Many tubes include printed graduations for volume measurement and color-coded caps for easy identification. Sterility is another critical feature, with pre-sterilized options available for sensitive applications. Some tubes are designed with conical bottoms to facilitate pellet collection after centrifugation, adding versatility to their use.
Application Areas
Cryogenic tubes are widely used in biobanks for preserving clinical samples, in pharmaceutical research for storing drug candidates, and in academic labs for genetic studies. They are also essential for IVF clinics storing gametes and embryos. In industrial settings, these tubes help maintain microbial cultures for biotechnology applications. Their role in COVID-19 vaccine development highlighted their importance in global health crises.
Maintenance and Precautions
Proper handling includes avoiding overfilling (leave headspace for expansion) and ensuring caps are tightly sealed before immersion in liquid nitrogen. Always use cryo-gloves and face protection when handling to prevent frostbite. For long-term storage, label tubes with frost-resistant markers. Regularly inspect tubes for cracks or cap damage. Avoid repeated freeze-thaw cycles, which can compromise sample quality.
B2B Procurement Guide
Bulk buyers should prioritize suppliers with ISO 13485 or similar certifications for medical-grade products. Key considerations include volume requirements (common sizes: 0.5 mL to 5 mL), sterilization needs (gamma-irradiated or non-sterile), and cap types. For high-throughput labs, consider racks-compatible designs. Leading manufacturers include Corning, Thermo Fisher, and Eppendorf. MOQs typically start at 1,000 units, with discounts for larger orders.
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