|
HS Code |
875529 |
| Chemical Formula | N2 |
| Appearance | Colorless liquid |
| Boiling Point | -195.79°C |
| Melting Point | -210.00°C |
| Density | 0.807 g/cm³ at boiling point |
| Molar Mass | 28.01 g/mol |
| Odor | Odorless |
| Solubility In Water | Very low |
| Specific Heat Capacity | 2.04 kJ/kg·K |
| Critical Temperature | -146.95°C |
As an accredited Liquid Nitrogen factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
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Purity 99.999%: Liquid Nitrogen with purity 99.999% is used in semiconductor wafer fabrication, where ultra-high purity ensures defect-free electronic components. Boiling Point -196°C: Liquid Nitrogen with a boiling point of -196°C is used in cryogenic preservation of biological samples, where stable ultra-low temperatures maintain cell viability. Low Viscosity: Liquid Nitrogen characterized by low viscosity is used in rapid food freezing processes, where quick heat transfer preserves texture and nutrients. High Thermal Stability: Liquid Nitrogen exhibiting high thermal stability is used in cryogenic grinding of polymers, where controlled cooling improves particle size uniformity. Odorless and Inert Gas: Liquid Nitrogen as an odorless and inert gas is used in inerting storage tanks, where oxygen displacement prevents oxidation and fire risks. Stable Storage Temperature -210°C: Liquid Nitrogen with a stable storage temperature of -210°C is used in superconducting magnet cooling, where precise temperature control enhances magnetic performance. Low Impurity Content: Liquid Nitrogen with low impurity content is used in pharmaceutical production, where contamination risks are minimized. Rapid Expansion Coefficient: Liquid Nitrogen with a rapid expansion coefficient is used in shrink fitting of metal parts, where thermal contraction allows for seamless assembly. |
| Packing | A double-walled, insulated metal dewar containing 10 liters of liquid nitrogen, featuring safety labeling, secure handles, and a pressure-relief valve. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Liquid Nitrogen in cryogenic tanks, ensuring secure, insulated transport to maintain ultra-low temperatures. |
| Shipping | Liquid nitrogen must be shipped in well-insulated, approved cryogenic containers (dewars or pressure vessels) designed for extremely low temperatures. The containers must be securely sealed and properly labeled according to hazardous materials regulations, indicating “Non-Flammable Gas” (UN1977). Proper ventilation during transport is essential to prevent pressure buildup and ensure safety. |
| Storage | Liquid nitrogen is stored in specialized, insulated containers known as Dewar flasks or cryogenic tanks. These vessels are designed to minimize heat transfer, preventing rapid vaporization. Storage areas should be well-ventilated to avoid asphyxiation hazards from nitrogen gas buildup. Containers must be clearly labeled, kept upright, and regularly checked for pressure buildup to ensure safe handling and storage. |
| Shelf Life | Liquid nitrogen does not have a shelf life; it slowly evaporates over time and must be kept in insulated containers. |
Competitive Liquid Nitrogen prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615365186327 or mail to sales3@ascent-chem.com.
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Manufacturing liquid nitrogen isn’t just about chilling things down to -196°C. Over the years, we have watched orders shift from small, cautious laboratory supplies to full-scale industrial applications. We have worked on tanks that fill a single Dewar flask at a time, as well as massive storage vessels that top up regular deliveries for food processors and semiconductor plants. This shift says something about how industries look at nitrogen now. They see it as a tool for improving quality, cutting waste, and powering innovation.
Customers come to us for liquid nitrogen knowing it’s not just another commodity. They need reliability in every liter, and they expect stability in price and purity. We provide liquid nitrogen in a range of purities, with 99.999% serving most labs and electronics manufacturers, while 99.9% suffices for many industrial users. Our plant runs in continuous cryogenic cycles; compressors and high-pressure distillation columns run twenty-four hours a day, stripping air of moisture and carbon monoxide, isolating nitrogen, and sending it down to storage as a liquid.
It’s easy to think of this product as “just cold,” but that oversimplifies things. The unique point with liquid nitrogen is its ability to absorb massive quantities of heat when vaporizing, so you get extremely fast cooling without introducing contaminants or residues. We’ve seen this in action on a thousand food processing lines—where rapid freezing locks in moisture and nutrition in ways that static blast chills never achieve. In medical labs, sample vials lowered into our filled Dewars spend months or years in suspended animation, protected from both chemical reactions and biohazards.
For electronics and precision engineering, the usefulness grows. Some customers bring us detailed demands for ultra-high purity, where even parts-per-million trace gases create unacceptable risks. Liquid nitrogen works as a clean, inert atmosphere during the manufacturing of certain silicon wafers, and it’s often used in purging high-vacuum systems prior to sensitive tests. Welding shops chill steel components with it, exploiting the contraction as metal hardens into tolerance. Dry ice will never compete in these fields; the temperatures simply aren’t low enough, and the inherited carbon dioxide is a risk.
Every few weeks someone asks how tough it is to keep up this output of -196°C nitrogen. We’ve learned over the past decade that every step in our process affects the final product: air intake filtration, high-capacity compressors, and multi-stage cryogenic distillation run non-stop. Every hour, sensors pick up the mildest impurity spikes, and our automated bleed routines keep the purity constant. Liquid nitrogen usually leaves in standard insulated tankers, ranging from 180-liter portable vessels to trailer trucks topping out near 24,000 liters. For research and clinical users, we fill smaller vessels under the same conditions, just backed by stricter recordkeeping and extra vapor handling steps.
Commercial customers value the regularity. Running a food production line or cryogenic pipe cleaner can’t wait for a shipment held up by a leaky gasket or a pump failure. The backup systems and round-the-clock attention from engineers keep supply steady. Temperature fluctuations never happen in our pipeline—our insulation specs and transfer piping stand up to the demands. That way, there’s no foaming on transfer and almost no product loss before it reaches the customer’s tank.
Some customers start out thinking liquid nitrogen is interchangeable with other cryogens, especially liquid oxygen or argon. Working in this field, we know the differences matter. Liquid nitrogen is colorless, odorless, and leaves no residue. By contrast, liquid oxygen freezes combustibles and enhances risk by making things far more flammable than usual. Breathing vapors from spilled nitrogen only displaces oxygen—it doesn’t create the same combustibility alarms. In our engineering shop, this means extra care with oxygen lines, but more ordinary caution on nitrogen storage.
Over the years, the transport side has taught us that liquid nitrogen moves with fewer regulatory headaches than oxygen, thanks to its inert nature. But the temperature extremes still wreck ordinary piping, so tanks get special vacuum insulation and the valves we install have to stay functional at temperatures near absolute zero. Liquid nitrogen is lighter than other cryogens, so boil-off rates differ. Any time we store nitrogen and argon together, the distinct properties mean the hardware never truly matches across both.
Solid carbon dioxide—dry ice—gets compared to liquid nitrogen quite often, especially by newcomers. Some buyers want it for shipping perishable goods, believing it keeps things colder for longer. We’ve measured temperature curves and warn that dry ice bottoms out at -78.5°C. Liquid nitrogen beats that by over 100 degrees, making it essential for cryopreservation, supercooling metals, and high-speed processing of biomaterials. You lose that edge with dry ice, and you add in CO2. In almost every industrial context, that drawback alone rules out dry ice where nitrogen is available.
We see demand from a surprising spectrum. Food processors freeze meats, vegetables, and desserts faster with nitrogen than with air blast, and the ice crystals stay smaller, so cell walls remain intact. That becomes obvious in the quality of thawed products. In plastics, manufacturers use liquid nitrogen for deflashing molded parts—a process that sharpens edges without abrasive grinding. Welders shrink-fitting parts request the coldest possible dip tanks, trusting the subzero bath to drop metal size just enough for precision assembly.
Pharmaceutical production depends on liquid nitrogen for both freezing and for protecting temperature-sensitive compounds during years of storage. High-throughput labs order it in medium bulk, not just occasionally but on a strict, monitored delivery schedule. At the opposite end, boutique ice cream shops come to us asking for food-grade liquid nitrogen in smaller Dewars, aiming for theatrical demonstrations and micron-level fineness in their frozen treats.
Agricultural genetics and wildlife conservation programs have their own unique needs. Embryos, genetic material, and even some living cells survive storage best at liquid nitrogen temperatures. We’ve consulted directly with university veterinary programs desperate for continuity in their supply stream, especially in the breeding seasons. These demands drive us to maintain redundancy in our liquefaction and storage facilities, ensuring no single point of failure affects vital research.
No one in this business pretends liquid nitrogen is risk-free. Every seasoned operator has seen the burns it can cause or heard stories about pressure injuries. We take safety seriously, requiring full face shields, cryogenic gloves, and insulated aprons at every fill station. The plant floor has oxygen depletion monitors throughout, since spills vent large clouds of nitrogen vapor that actively push oxygen out of the room.
Our logistics team assesses customer setups during first-time deliveries. The wrong valve specification or poorly vented storage cabinet can create serious hazards. We provide detailed onboarding, and often our drivers walk through the initial delivery and filling procedures with new customers. Mishaps, while rare, do happen—usually traced to ignoring proper personal protection or letting vapor vents clog with ice. In our experience, thorough training and frequent reminders do more to prevent incidents than any technical upgrade.
Not all changes with liquid nitrogen come from regulation or customer request. In the last fifteen years, advances in energy recovery and compressor cycling have cut the electricity needed per liter by wide margins. We invest in heat exchanger technology and condensation recovery, since these directly control operating costs and environmental impact. On the plant floor, we track nitrogen leaks with continuous loss monitoring, closing system losses before they start affecting customer pricing.
As customers push for greener supply chains, the pressure grows to show better sourcing. We’ve added air separation feeds that use renewable grid power, and our on-site monitoring ensures purity for food and pharma applications matches documented claims. Waste nitrogen vapor can substitute for inerting or blanketing in some on-site industrial settings, so we help larger buyers tap off excess nitrogen vapor instead of simply venting it to the sky.
In some regions, we face logistical headaches from weather and infrastructure. Trucks hauling cryogenic tanks must travel before major storms hit, and plant managers monitor dew point and humidity before full-scale air separation starts. Every veteran operator knows about stuck valves in winter cold, or deliveries halted by summer flooding affecting plant access roads. Years in this industry have taught us redundancy matters even more than peak efficiency: if the main pipeline freezes or a bulk tank alarm fails, the backup has to work right the first time.
Direct supply from the producer cuts out shipping unknowns, chronic bottlenecks, and storage time risks. We built our reputation on meeting deadlines and upholding purity claims, and the feedback comes through every year in returning customers. Because we run the full operation—from gas compression to final transfer—we understand the bottlenecks: we control batch tracking, temperature logs, and cleanup standards. This eye for consistency shapes every shipment, whether it travels fifty kilometers or five hundred.
We don’t just hand off finished product and walk away until the next order. Technicians in our network follow up on tank performance and flow rates, making sure end users don’t hit unexpected downtime. If something blocks a valve or a customer’s gauge reads off, we reach out with the solution. In high-sensitivity industries like pharmaceuticals and research, downtime isn’t an option. Our track record on filling orders, shipping on time, and answering technical queries has built trust that outlasts cheaper prices elsewhere.
Every week brings a new story: a medical research center ramping up COVID-19 vaccine storage, a metalworks shop rolling out a custom annealing process, or a film studio freezing special effects props on set. We guide calls about margin pressures, rising transport costs, or storage tips. Each scenario tests our plant and supply chain, and our team leans on actual experience—lessons from past outages, odd purity requests, and major weather disruptions.
One challenge in today’s industrial landscape isn’t just the chemistry; it’s balancing consistent, high-quality output with unpredictable global supply lines. We source, store, and transport nitrogen with an eye on time and purity lost, not just costs. That means frequent in-house audits, on-call technical help, and tight relationships with cylinder and tanker manufacturers who share our tolerance for cold and our demand for accuracy.
Education plays a role, too. Customers often come in knowing some basics from university or online tutorials, but we’ve seen a hundred daily mishaps trace back to overlooked details: a cozy tank room without enough ventilation; a line fitted with the wrong insulation sleeve; a batch freezer overloaded and losing product quality. We make time to walk through the realities—tanks sweat, valves freeze, and quick fixes never beat preparation. Technicians train operators on safe filling, leak checks, and what to watch for when storage temperatures drift even by a few degrees.
Manufacturers who oversee their liquid nitrogen production from intake to output know every detail matters. From how the air is filtered at intake to the cycle time on compressors, every process affects the finished product. We’ve built systems for continuous monitoring, frequent staff training, and open lines between production and logistics. That lets us adapt—whether it's a sudden spike in pharma demand, changes in allowable transportation routes, or a request for new vessel sizes.
Our staff spends more time troubleshooting on the plant floor than behind desks. This face-to-face knowledge—of how equipment responds on cold winter mornings or during heavy power draw in summer—can't be replaced by manuals. Repairs and cleanouts down to the gasket and valve seat make the difference between smooth deliveries and costly downtime. The reliability our clients depend on comes from long hours and lessons learned, not just specs printed in a catalog.
To handle interruptions in supply, we maintain on-site reserves big enough to buffer regular outages, whether caused by equipment repairs or regional disasters. Automated controls trigger early warnings, and our logistics planners reroute shipments before small problems become major losses. Where transport times stretch, we use pressure-rated, high-insulation vessels that keep boil-off losses low, and we’ve worked with tanker builders to mesh vessel design with our real-world delivery conditions, not just lab specs.
Energy use remains a stubborn cost and environmental concern. Upgrades in compression technology, heat exchange systems, and smart cycling allow us to squeeze more liters per kilowatt-hour year after year. Government regulations push for higher efficiency, but customer demand for low-carbon sourcing already drives us to invest before rules change. In regions where renewable energy is reliable, our plants run on low-carbon electricity, and we monitor for further gains as national grids decarbonize.
Process safety sees gains through a mix of better gear and ongoing staff education. Layering active oxygen monitors, robust personal protective equipment, and real-life simulation drills curb the worst incidents. New electronic fill procedures record every drop transferred and every transfer interruption, giving us rapid traceability and accountability.
Liquid nitrogen stands at the intersection of chemistry, logistics, and daily problem solving. After years in this business, we know every rush order tells its own story—sometimes as a race against spoilage, sometimes a scramble to bring a new medical device online. Having direct control over the liquid nitrogen we send out means we don’t guess or rely on third-hand data. We track the complete chain from intake air to liquid in customer tanks, and we’ve built our reputation on precision, follow-through, and a clear answer to every question that comes our way.
The world keeps asking for colder, cleaner, and more consistent cryogenic solutions. We remain committed to pushing improvements, tackling the energy and logistics hurdles, and passing on both savings and real assurance to the customers who depend on our product. Every tank, every fill, every consultation reflects both the science and the real-world lessons we have earned as manufacturers of liquid nitrogen.