Applications | Material safety data sheet


SECTION 8 PHYSICAL AND CHEMICAL PROPERTIES
1
 Name ARGON
2
 Formula Ar
3
 CAS Number 7440-37-1
4
 Molecular Weight 39.948
5
 Melting point 83.8 K , -189.35 C , -308.83 F
6
 Boiling point @ 101.325 kPa (1 atm) 87.28 K , -185.87 C , -302.57 F
7
 Critical Temperature 150.86 K , -122.29 C , -188.12 F
8
 Critical Pressure 48.98 bar , 48.34 atm , 710.4 psia
9
 Critical Volume 74.59 cm3/mol
10
 Critical Density 0.5356 g/cm3
11
 Critical Compressibility Factor 0.291
12
 Acentric Factor 0.000
13
 Density of Liquid @ -140 C 1.028 g/cm3
14
 Coefficient of thermal Expansion of Liquid @ 25 C 0.01113 1/C
15
 Surface Tension @ -189 C 13.4 dynes/cm
16
 Density of Gas @ 1 atm and 70 F (21.1 C) 1.654 kg/m3 , 0.1033 lb/ft3
17
 Relative Density of Gas @ 1 atm and 70 F (Air =1) 1.379
18
 Enthalpy of Vaporization @ Boiling Point 161.21 kJ/kg , 69.32 BTU/lb
19
 Enthalpy of Fusion @ Melting Point 29.59 kJ/kg , 12.72 BTU/lb
20
 Heat Capacity of Gas @ 25 C , Constant Pressure (CP) 0.52 kJ/(kg K) , 0.124 BTU/(lb R)
21
 Heat Capacity of Gas @ 25 C , Constant Volume (CV) 0.312 kJ/(kg K) , 0.075 BTU/(lb R)
22
 Ratio of Heat Capacities for Gas , CP/CV 1.667
23
 Heat capacity of Liquid @ -173 C 1.146 kJ/(kg K) , 0.274 BTU/(lb R)
24
 Heat capacity of Solid @ -203 C 0.895 kJ/(kg K ) , 0.214 BTU/(lb R)
25
 Entropy of Gas @ 25 C 154.73 J/(mol K)
26
 Entropy of Formation of Gas @ 25 C 0 J/(mol K)
27
 Enthalpy of Formation of Gas @ 25 C 0 kJ/mol
28
 Gibbs Energy of Formation of Gas @ 25 C 0 kJ/mol
29
 Solubility Parameter 14.138 (J/cm3)^0.5
30
 Liquid Volume 28.586 cm3/mol
31
 Solubility in Water @ 25 C 54.13 parts per million (wt)
32
 Octanol-Water Partition Coefficient , log KOW
-
33
 Henry's Law Constant for Compound in Water @ 25 C 39696.1 atm/mol fraction
34
 Viscosity of Gas @ 25 C 224.42 micropoise
35
 Viscosity of Liquid @ -130 C 0.054 centipoise
36
 Thermal Conductivity of Gas @ 25 C 0.01795 watts/(m K)
37
 Thermal Conductivity of Liquid @ -150 C 0.088 watts/(m K)
38
 Lower Explosion Limit in Air
-
39
 Upper Explosion Limit in Air
-
40
 Flash Point Temperature
-
41
 Autoignition Temperature
-
42
 Enthalpy of Combustion @ 25 C (77 F)
-
43
 Threshold Limit Value (ACGIH)
-
44
 Permissible Exposure Limit (OSHA)
-
45
 Recommended Exposure Limit (NIOSH)
-

SECTION 9 STABILITY AND REACTIVITY
Reactivity Stable at normal temperature and pressure.
Conditions to avoid Protect from physical damage and heat. Containers may rupture or explode if exposed to heat. Avoid contact with water or moisture.
Incompatibilities No data available
Hazardous decomposition Thermal decomposition product : miscellaneous decomposition products
Polymerization Will not polymerize.

SECTION 10 TRANSPORT INFORMATION
Proper shipping name Argon , refrigerated liquid
(Cryogenic liquid)
Labeling requirements Nonflammable gas

 

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