Product Overview

Liquid Argon Gas is the cryogenic liquid form of the noble gas argon (Ar), obtained through the fractional distillation of liquefied air. It is one of the most versatile and widely used industrial cryogens. As a dense, inert, and non-reactive fluid, liquid argon serves as an excellent coolant and protective medium across numerous industries. Its stability, high purity, and efficient storage properties make it indispensable for applications ranging from metal fabrication to scientific research. The reliable supply and handling of high-quality liquid argon are critical for processes that demand consistent performance and safety.

Basic Information

CAS No.	7440-37-1
UN No.	UN 1951 (Argon, refrigerated liquid)

Key Attributes & Parameters

Purity	Typically ≥ 99.999% (5N grade) is standard, with ultra-high purity grades (e.g., 99.9999%) available for specialized applications.
Boiling Point	-185.9 °C (-302.6 °F) at atmospheric pressure.
Density	~1.40 g/mL at its boiling point.
Appearance	Colorless, odorless, non-toxic cryogenic liquid.
Expansion Ratio	1 volume of liquid expands to approximately 842 volumes of gas at 21°C

Features & Advantages

Excellent Inert Shielding

Provides a completely inert atmosphere, preventing oxidation, decarburization, and other unwanted chemical reactions during high-temperature processes.

High Cooling Capacity

Its significant latent heat of vaporization makes it highly effective for rapid cooling and temperature control.

Consistent High Purity

Readily produced and maintained at high purity levels, ensuring process consistency and product quality, especially in welding and crystal growth.

Cost-Effective & Readily Available

As the third-most abundant gas in the atmosphere, it is economically produced and widely accessible for large-scale use.

Functional Characteristics

Liquid Argon Gas is stored in vacuum-insulated containers (Dewars or tanks) to minimize evaporation. Its primary function is to deliver a reliable source of inert gas or intense cooling. When vaporized, it produces a large volume of dry, oxygen-free argon gas ideal for blanketing and shielding. In its liquid state, it is used for direct contact cooling. Its inert nature makes it safe to handle in most environments, though precautions are needed due to its extreme cold and ability to displace oxygen.

Primary Application Fields

Metal Manufacturing & Fabrication

Shielding gas for Tungsten Inert Gas (TIG) and Gas Metal Arc (MIG) welding of non-ferrous metals like aluminum and titanium; atmosphere control in heat treating furnaces.

Electronics & Semiconductors

Inert purging atmosphere for crystal growth (e.g., silicon, germanium) and in the manufacturing of LEDs and microelectronics.

Analytical Instruments

Carrier and detector gas in Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS).

Lighting

Filling for incandescent, fluorescent, and energy-saving light bulbs to prevent filament oxidation.

Research & Cryogenics

Used as a target or detector medium in particle physics (e.g., in Liquid Argon Time Projection Chambers) and as a general-purpose cryogen in laboratories.

Customer Collaboration Case

A leading aerospace manufacturer partnered with us to secure a high-volume, high-purity liquid argon supply for their advanced aluminum welding lines. The stringent quality standards for aircraft components demanded an inert shielding gas with exceptionally low levels of moisture and oxygen to prevent weld porosity and ensure joint integrity. We implemented a dedicated on-site bulk liquid argon storage and vaporization system, coupled with a point-of-use purity monitoring setup. Our consistent supply and technical support in optimizing gas flow and coverage enabled the manufacturer to achieve flawless weld quality, reduce rework rates by over 15%, and maintain uninterrupted production critical to their delivery schedules. This partnership underscores how reliable liquid argon supply chains are foundational to high-stakes manufacturing.

FAQ

Q: What are the filling requirements and submission procedures for the Dangerous Goods Declaration Form (DGD) for the export of hazardous chemicals?

A: Filling requirements: The product name, UN number, hazard category, packaging type, quantity, weight, sender/receiver information must be accurately filled in. It should be signed and confirmed by personnel with hazardous goods declaration qualifications. Submission process: For sea transportation, it needs to be submitted to the shipping company and maritime department 24 hours before loading; for air transportation, it needs to be submitted to the airline and customs 12 hours before loading. Our document specialist has the qualification for hazardous goods declaration and can complete the filling and submission of the DGD throughout the process to ensure compliance with the declaration.

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