This application enables data on many gas molecules to be accessed rapidly.
You can search on a raw chemical formula, chemical name or UN transportation code. The values displayed on this page are extracted from the literature and the proprietary current AIR LIQUIDE Group data.
GENERALITIES:
The name argon comes from the Greek αργόν (argos) meaning "the lazy one" in reference to its chemical inactivity.
The atmosphere contains about 0.9 % of argon. A neutral and colorless gas like nitrogen, it does not however exist in nature other than in the air. It cannot sustain life, but it is highly used in certain industrial applications due to its high level of chemical inertness and the relative ease with which it can be produced.
Argon can be used in a controlled atmosphere to replace nitrogen in most applications. Its solubility (twice that of nitrogen) and certain molecular characteristics give it special properties for use with vegetables. Under certain conditions, it slows down metabolic reactions and significantly reduces breathing (§ ALIGAL™).
Argon is used to prevent contact, hence interaction, between liquid metal and the surrounding atmosphere. Applications include melt stirring, tun dish purging to prevent steel re-oxidation and secondary steel refining in vacuum degassers, such as the VOD, RH, RH-OB. However, the largest quantities of argon are consumed in the AOD process for decarburising raw high-chromium steels while minimizing the chromium oxidation.
Used pure and in mixtures for industrial and hospital analyses and quality control.
More particularly, argon is used as plasma gas in inductive coupled plasma emission spectrometry (ICP), blanket gas in graphite funace atomic absorption spectrometry (GFAAS) and as carrier gas in gas chromatography for various detector.
In mixture with methane, argon is used in Geiger counter and in the detector of X Ray Fluorescence (XRF) as quentching gas.
Ultra-pure argon is used as carrier gas for reactive molecules, as inert gas to protect semiconductors against impurities (e.g. Argon provides the atmosphere for growing crystals of silicon and germanium).
Under ionic state, argon is used for sputtering, ion implantation, annealing and etching processes in semiconductor or high performance material manufacturing.
Molecular Weight
- Molecular weight : 39.948 g/mol
Solid phase
- Melting point : -189 °C
- Latent heat of fusion (1,013 bar, at triple point) : 29.41 kJ/kg
Liquid phase
- Liquid density (1.013 bar at boiling point) : 1392.8 kg/m3
- Liquid/gas equivalent (1.013 bar and 15 °C (59 °F)) : 835 vol/vol
- Boiling point (1.013 bar) : -185.9 °C
- Latent heat of vaporization (1.013 bar at boiling point) : 160.81 kJ/kg
Density & temperature calculation of the liquid phase
Given the pressure (in bar), this module calculates the temperature and the density of the liquid phase on the liquid-gas equilibrium curve
Enter the pressure in bar (between 1 and 15) bar
Critical point
- Critical temperature : -122.3 °C
- Critical pressure : 48.98 bar
- Critical density : 537.7 kg/m3
Triple point
- Triple point temperature : -189.4 °C
- Triple point pressure : 0.687 bar
Gaseous phase
- Gas density (1.013 bar at boiling point) : 5.853 kg/m3
- Gas density (1.013 bar and 15 °C (59 °F)) : 1.67 kg/m3
- Compressibility Factor (Z) (1.013 bar and 15 °C (59 °F)) : 0.9993
- Specific gravity (air = 1) (1.013 bar and 21 °C (70 °F)) : 1.38
- Specific volume (1.013 bar and 21 °C (70 °F)) : 0.606 m3/kg
- Heat capacity at constant pressure (Cp) (1 bar and 25 °C (77 °F)) : 0.02 kJ/(mol.K)
- Heat capacity at constant volume (Cv) (1 bar and 25 °C (77 °F)) : 0.012 kJ/(mol.K)
- Ratio of specific heats (Gamma:Cp/Cv) (1 bar and 25 °C (77 °F)) : 1.664
- Viscosity (1.013 bar and 0 °C (32 °F)) : 0.0002099 Poise
- Thermal conductivity (1.013 bar and 0 °C (32 °F)) : 16.36 mW/(m.K)
Miscellaneous
- Solubility in water (1.013 bar and 0 °C (32 °F)) : 0.0537 vol/vol
- Concentration in air : 0.934 vol %
The vapor pressure curve may be obtained by clicking on the image. On the graph, pressure is in bar or 0.1 MPa, temperature in K or °C. The critical point is indicated by a black spot on the liquid-vapor equilibrium curve.
Liquid to gas conversion
This module enables a volume (measured at 1 atmosphere and boiling point) or a mass of liquid gas to be converted into a volume or a mass of gas measured at 1 atmosphere and 15 °C.
Data : liquid Phase
Input the volume (m3) or mass (kg)
Gas to liquid conversion
This module enables a volume (measured at 1 atmosphere and 15 °C) or a mass of gas in gaseous phase to be converted into a mass or a volume of liquid (measured at 1 atmosphere and boiling point).
Data : Gas Phase
Input the volume (m3) or mass (kg)
Go back to choosing the units
You have direct access to your country’s Material Safety Data Sheets:
Spain
- Major hazard : High Pressure and Suffocation
- Toxicity (Am. Conf. Of Gov. Ind. Hygienists ACGIH 2000 Edition) : Simple Asphyxiant
- Flammability limits in air (STP conditions) : Non-flammable
- Odour : None
- UN Number : UN1006 (gas); UN1951 (liquid refrigerated)
- EINECS Number : 231-147-0
- DOT Label (USA) : NFG
- DOT Hazard class (USA) : Non flammable Gas
Air Liquide has assembled data on the compatibility of gases with materials to assist you in evaluating which products to use for a gas system. Although the information has been compiled from what Air Liquide believes are reliable sources (International Standards: Compatibility of cylinder and valve materials with gas content; Part 1: ISO 11114-1 (Jul 1998), Part 2: ISO 11114-2 (Mar 2001)), it must be used with extreme caution. No raw data such as this can cover all conditions of concentration, temperature, humidity, impurities and aeration. It is therefore recommended that this table is used to choose possible materials and then more extensive investigation and testing is carried out under the specific conditions of use. The collected data mainly concern high pressure applications at ambiant temperature and the safety aspect of material compatibity rather than the quality aspect.
Material
Compatibility
Metals
Stainless Steel
Satisfactory
Plastics
Polyamide (PA) (NYLON™)
Satisfactory
Polypropylene (PP)
Satisfactory
Elastomers
Nitrile rubber (NBR)
Satisfactory
Chloroprene (CR)
Satisfactory
Lubricants
You can choose the units in which the values are displayed. By default, SI units are selected.
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