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HS Code |
531358 |
| Chemicalformula | Ar |
| Casnumber | 7440-37-1 |
| Molarmass | 39.95 g/mol |
| Stateatroomtemperature | Gas |
| Appearance | Colorless liquid when cooled below boiling point |
| Boilingpoint | -185.8°C (87.3 K) |
| Meltingpoint | -189.3°C (83.8 K) |
| Density | 1.40 g/cm³ at boiling point |
| Odor | Odorless |
| Solubilityinwater | 20.0 mg/L at 20°C |
| Criticaltemperature | -122.4°C (150.8 K) |
| Criticalpressure | 4.898 MPa |
| Vaporpressure | 133 kPa at -185.8°C |
| Thermalconductivity | 0.117 W/m·K at 90 K |
| Refractiveindex | 1.231 at 87 K |
As an accredited Liquid Argon 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 Argon purity 99.999% is used in semiconductor manufacturing, where it ensures ultra-clean environments for precise wafer processing. Boiling Point -185.8°C: Liquid Argon boiling point -185.8°C is used in cryogenic preservation of biological samples, where it enables long-term storage without thermal degradation. Density 1.40 g/cm³: Liquid Argon density 1.40 g/cm³ is used in particle physics experiments, where it provides optimal radiation shielding and particle detection efficiency. High Purity Grade: Liquid Argon high purity grade is used in metal fabrication processes, where it achieves contaminant-free shielding during welding. Stability Temperature Range -186°C to -150°C: Liquid Argon stability temperature range -186°C to -150°C is used in deep cryogenic cooling applications, where it maintains consistent system temperatures for sensitive instrumentation. Ultra-Low Impurity Content: Liquid Argon ultra-low impurity content is used in gas chromatography, where it improves analytical measurement accuracy. Controlled Evaporation Rate: Liquid Argon controlled evaporation rate is used in laboratory spectrometry, where it ensures consistent sample cooling for reproducible results. Certified Oxygen-Free: Liquid Argon certified oxygen-free is used in glovebox inerting, where it prevents oxidation and maintains material purity. |
| Packing | Liquid Argon is supplied in a sturdy, insulated 160-liter stainless steel dewar cylinder, featuring pressure-relief valves and secure labeling. |
| Container Loading (20′ FCL) | Liquid Argon is loaded into 20′ FCL ISO tank containers, ensuring secure, temperature-controlled, leak-proof bulk transportation for industrial shipments. |
| Shipping | Liquid argon is shipped in insulated, pressure-rated cryogenic tanks or dewars to maintain temperatures below -186°C. Containers are clearly labeled for hazardous materials, comply with DOT and international transport regulations, and are equipped with pressure relief devices. Proper ventilation and secure handling are essential to prevent asphyxiation or pressure hazards during transport. |
| Storage | Liquid Argon is stored in specialized, insulated, and pressure-rated cryogenic tanks to maintain its extremely low temperature (-186°C or lower) and prevent evaporation. These tanks are typically double-walled with vacuum insulation to minimize heat transfer. Cryogenic liquid cylinders or larger bulk storage vessels are commonly used, ensuring safety and stability during storage, transport, and handling. |
| Shelf Life | Liquid argon has an indefinite shelf life if stored properly in sealed, insulated containers to prevent contamination and evaporation. |
Competitive Liquid Argon 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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Tel: +8615365186327
Email: sales3@ascent-chem.com
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In our plant, turning raw, atmospheric argon into high-purity liquid argon has never been just another stage in the pipeline—it’s always been about reliable delivery and repeatable quality. Our customers work in places where a difference of a few parts per million matters, whether it’s for running their shielding gas mixtures in a robot-welded assembly line or calibrating sensitive scientific equipment. Because we handle every link of the chain, the product we provide flows directly from our liquefaction lines to your equipment with a clear provenance and a guarantee of consistent quality.
The liquid argon our team produces comes out of a cryogenic process rooted in strict separation, rectification, and purification, reaching a purity level that typically exceeds 99.999%. Each batch runs through both on-line analytics and sample-based laboratory checks before it leaves our facility. Our Model LAr-5000 is the latest in our run of high-purity bulk liquids—stored, shipped, and discharged at temperatures below −185°C. Whether your operation requests standard 180-liter dewars or full ISO tank container loads, the liquid remains at the same purity grade, batch after batch.
We’ve met customers from metal fabrication, semiconductor foundries, medical imaging, and university research labs. Each application has its own deal-breakers. For welders using dual-shield systems on high-end structural steel, our liquid argon provides reliable inertness, observed in smoother arcs and spatter-free beads. Cleanroom users report zero interference for process controls as trace oxygen and moisture are tightly limited—typically below one part per million. As an excimer laser working gas carrier, the benefits show in stable beam parameters and fewer optics-cleaning cycles. Consistent quality means fewer halts on the production floor when argon’s used to create controlled atmospheres or for purging.
Specifications include a measured density at liquefaction of 1.4 g/cm³, and a boiling point at atmospheric pressure of −185.8°C. We secure trace impurity levels, routinely batching oxygen content below 1 ppm and total hydrocarbons below 0.5 ppm. These aren’t just numbers written into a data sheet—they’re values we work into every tanker or dewar that touches our filling racks. Transport and storage use vacuum-jacketed containers, preventing unwanted vaporization and cross-contamination, with continuous temperature and pressure logging. Over years of feedback, our customers seldom cite off-gassing or impurity spikes as operational hazards, which speaks to the fine controls, not just to what’s measured in the analytic report.
Some ask what sets our liquid argon apart from what a trader might offer. We don’t just deliver a commodity; we deliver from a single, named facility that uses on-site air separation units running continuous cycles. There is traceability from atmospheric intake through to the fill you receive. Our on-staff chemists calibrate sensors and run periodic round-robin testing with independent labs, using internationally accepted standards. Some bulk suppliers pool product from outside vendors or blend to make up shortfalls; our process never leaves the hands of our own workforce.
Because our logistics start and end at our plant, users get clean argon from precisely the same separation cascade every time. For semiconductor customers, this means every fill protects wafer quality as reliably as the last batch. In the metals industry, one saw operator running multi-pass welds across large, specialty-designed sections commented that inconsistent shielding led to porosity problems with her previous supplier, but since switching to our liquid argon line, call-backs for weld flaws dropped off. We believe quality comes from never breaking the supply chain—not just controlling the storage and shipping, but entirely owning the air separation and liquefaction, too.
Liquid argon is not simply about offering the right boiling point or colorless, odorless liquid in a cold-rolled tank. Most of the requests we hear come with implicit questions about safety and purity. We run redundant purity meters, both electronic and chemical, through each run, and every iso-container or microbulk fill goes through a release protocol only possible at a facility that owns the entire feed, right down to the ambient air compressors. Not every manufacturer can show records detailing both nitrogen carryover from the separator and carbon monoxide signatures on each load—these are numbers that tell the real story about purity.
For some, filling demands swing from a hundred liters a day all the way up to 30,000 liters for short-demand cycles. Our ability to ramp liquefaction cycles up or down means supply doesn’t lag behind—or worse, get replaced with mixed-source argon that risks cross-contamination. Our long-run pipeline customers often prefer a vendor with quick pivot times and the capacity for short-lead tank refills. We keep a fleet of modular storage tanks and a dispatch team that remains available for 24-hour callouts, which most resellers and brokers can only arrange through third parties. The process of direct factory loading allows us to stand behind traceability and uninterrupted cold chain delivery with more certainty.
Argon, asphyxiant in confined spaces, commands more respect in our plant than paperwork safety protocols ever could. We have trained staff who have lived the risks—those who’ve stood in vapor zones during pressured fills, run line purges, and managed tank swaps in 40-degree summer heat and through winter blizzards. Their knowledge shapes our site procedures and fills our delivery guidance sheets. Most accidents with cryogenic liquids come from lapses in real-world experience rather than faulty tankage. Our crews stick with proven, multi-layered valve locks, monitored transfer lines, and visible labeling down to each spare dewar. We keep spill response gear adjacent to transfer points and conduct drills based on incidents seen in real transfer mishaps, not theoretical scenario files.
Customers often ask about venting systems and overpressure protection on the tanks we send them. We’ve retrofitted every mobile cryogenic vessel to guarantee dual-pressure relief lines and insulated standoff handles, reducing risk while decanting. Our filling trailers include active vapor recovery loops that lessen argon waste and improve economy for high-frequency users. Feedback loops from our delivery team matter—if field workers note a handling risk, our engineering section redesigns packaging or modifies shipping protocols to address it directly. No repackaged or cross-filled tank ever leaves our yard because secondary filling introduces trace air and moisture—the two enemies of quality in inert gas service.
Through years of direct factory distribution, we have carved out techniques that favor reliability over headline specs. One of the most common customer anxieties is downtime due to supply failures or inconsistent purity. To counter this, every transport tank comes with load data tied to the batch record visible to both field operators and receiving lab managers. Our digital record-keeping backs up each fill ticket with chromatograph readings and date-stamped quality logs. Direct customer calls to our site find a production tech or an on-floor supervisor who worked on that week’s shipment, not just a hotline operator with generic answers.
We know the differences between liquid gases produced from single-source units and those cobbled together at bulk transfer depots. Customers switching away from resellers report fewer cleanup cycles, steadier process results, and less wandering on critical measurements. For example, high-field MRI equipment that had chronic superconducting coil boil-off due to impurities in fill lines saw marked decreases in nitrogen and oxygen traces after changing suppliers to our direct line. This is not because of some marketing formula, it comes from hands-on checks at every phase, from boil-off compressors to cold-box trace monitors.
Argon separation is energy-intensive, a reality that we have faced since building our original fractionation columns. Every release we make has to answer for its environmental cost. Over the past decade, we invested in closed-loop waste vapor capture for our air intake compressors, cutting the loss of cooled argon into the atmosphere by more than a third. Before automated trace capture technology, a significant percentage of liquefied gases lost their cold charge during transfer. Today, recirculated chillers and improved insulation on our load arms limit the boil-off. This shows up for the end-user as fuller tanks and more efficient usage, but our internal logs show sharp downturns in our own energy expenditures for the same output.
Some of the “green” credentials others talk about come down to accounting tricks—carbon offsets and paperless reports. From our view, responsible production means installing more accurate leak detectors, expanding on-site recovery lines, and training our fill crews to identify fugitive losses at the stem, not just at the vent cap. For operations sensitive to indirect environmental regulatory pressure, we provide detailed emission logs, updated quarterly, tied to each purchase order for audit clarity. This evidence of energy consumption and loss reduction helps downstream users meet both internal and statutory reporting requirements. Our production facility also initiates yearly reviews of energy efficiency, adjusting operating parameters and investing in new turbine and compressor tech as it becomes available.
The distance between operator, plant, and customer distinguishes a manufacturer’s product from generic, traded gases. Overheads run higher, but so does investment in redundancy and oversight. Customers running high-reliability processes—beamlines, high-stakes metallurgical runs, semiconductor vapor phase doping—require predictable behavior from their cryogenic liquids. Purchase from a manufacturer means the person answering your technical query designed the control protocol, sat on the batch review, or ran tank integrity trials in the real environment, not just at a reseller’s office desk.
Traders and resellers may rebadge gas, but only a manufacturer manages cryogenic cascade uptime, controls purification cycles, and absorbs liability for nonconformity from the air intake forward. Factory modularity matters when the question is ramping capacity up for a research surge or when switching output purity for a one-off calibration job. By integrating shipping, traceability, and storage with manufacturing, our team supports production schedules at a finer level of precision. This sidesteps the uncertainty of pooled sources and avoids compatibility risks between tank batches.
Years of direct customer engagement show a clear pattern: most users do not worry about specifications on paper, but about the consequences when a fill goes wrong. Users describe issues such as scaling on component surfaces, filter clogging, or failed atmosphere control. These do not originate at the point of use—they go back to micro-level variation in supplied liquid. With access to supervisory staff and plant-side analytics, we can trace every complaint to a production cycle and batch, address root causes, and issue corrective actions. Manufacturers that check off compliance boxes, rather than address every call as a technical challenge, often miss this feedback loop.
Actual competition among liquid argon suppliers rests not in price per liter but in fewer costly shutdowns, maintenance trips, and loss events. For high-purity needs, vendor reputation rises or falls with tank returns—users often cite fewer bottle swap-outs and longer process uptime from direct manufacturer fills. For customers with sudden surges in argon consumption—seasonal production, contract wins, or rapid scaling—a fixed capacity from a third-party seller seldom keeps up. With control of plant dispatch and fill levels, we can adjust supply volume and prioritize critical loads. During pandemic surges, our ability to allocate plant production lines for medical imaging gas supply demonstrated how quickly direct control turns theory into practice.
University and lab users rely on liquid argon not only as a shielding gas, but as a sensitive medium for particle detection and spectroscopic calibration. In basic science, the tiniest variance in oxygen or other trace contaminants can render weeks’ worth of data unreliable. As the direct manufacturer, our input into procurement and supply lets us tailor load size, delivery frequency, and even ultra-high purity runs for these customers. We collaborate with principal investigators to select sampling points, verify compatibility with receiver systems, and troubleshoot field transfer issues.
Some of the world’s leading physics experiments—dark matter searches, neutrino detectors—demand a purity regime almost unimaginable in commercial supply. Our technical staff works with these teams to ensure fills match both batch records and independent analyses. The laboratory-scale approach extends to our support for smaller research operations: cleanroom cytometry, atmospheric simulation, and laser test beds. Flexibility comes not from working off a fixed external supply, but from our ability to dedicate a liquefaction run to a lab, then manage the fill from plant to delivery point, without handoffs or risk of cross-fill.
We have received testimonials from operators who depended on stability during long-term projects. One example was a foundry-dependent gear manufacturer whose line output hinged on low-porosity weld beads. Trouble started with sporadic uptake of airborne nitrogen through their old supplier’s returned tank sets. After a switch to our product, their annual throughput increased with no increase in post-weld rework calls. Another research site, running photon detection in a near-vacuum environment, noted that legacy argon brings along hidden water traces from tanks crossfilled at depot sites—a problem eliminated by our on-site fill/run protocols.
The relationship built through direct factory contact allows us to respond with real corrective actions—be it boosting fill batch frequency to smooth delivery gaps, supplying technical breakdowns of trace contaminants for a research report, or modifying discharge protocols for a production plant. Every piece of customer feedback tightens our process, ensuring the next shipment reflects adjustments not only in product, but also in our service process.
We manufacture liquid argon in response to both present needs and the evolving demands of science and industry. Over several decades, our staff, equipment, and know-how have created a chain that links the raw air above our plant directly to your critical processes, untouched by reseller hand-offs or outsourced logistics. This keeps us accountable, helps you avoid the headaches of purity failures or unpredictable supply, and drives us to keep looking for new ways to increase efficiency, purity, and user satisfaction with every batch. Our commitment stems from on-the-ground experience, technical precision, and a direct connection with everyone who opens an argon valve at the point of use.