Applications | Material Safety Data Sheets


SECTION 8 PHYSICAL AND CHEMICAL PROPERTIES
1
 Name NITROGEN
2
 Formula N2
3
 CAS Number 7727-37-9
4
 Molecular Weight 28.013
5
 Melting point 63.15 K , -210 C , -346 F
6
 Boiling point @ 101.325 kPa (1 atm) 77.35 K , -195.8 C , -320.44 F
7
 Critical Temperature 126.1 K , -147.05 C , -232.69 F
8
 Critical Pressure 33.94 bar , 33.5 atm , 492.26 psia
9
 Critical Volume 90.1 cm3/mol
10
 Critical Density 0.3109 g/cm3
11
 Critical Compressibility Factor 0.292
12
 Acentric Factor 0.040
13
 Density of Liquid @ -180 C 0.729 g/cm3
14
 Coefficient of Thermal Expansion of Liquid @ 25 C 0.00753 1/C
15
 Surface Tension @ -210 C 12.2 dynes/cm
16
 Density of Gas @ 1 atm and 70 F (21.1 C) 1.160 kg/m3 , 0.0724 lb/ft3
17
 Relative Density of Gas @ 1 atm and 70 F (Air =1) 0.967
18
 Enthalpy of Vaporization @ Boiling Point 202.76 kJ/kg , 87.19 BTU/lb
19
 Enthalpy of Fusion @ Melting Point 25.7 kJ/kg , 11.05 BTU/lb
20
 Heat Capacity of Gas @ 25 C , Constant Pressure (CP) 1.038 kJ/(kg K) , 0.248 BTU/(lb R)
21
 Heat Capacity of Gas @ 25 C , Constant Volume (CV) 0.741 kJ/(kg K) , 0.177 BTU/(lb R)
22
 Ratio of Heat Capacities for Gas , CP/CV 1.401
23
 Heat capacity of Liquid @ -183 C 2.13 kJ/(kg K) , 0.509 BTU/(lb R)
24
 Heat capacity of Solid @ -223 C 1.489 kJ/(kg K ) , 0.356 BTU/(lb R)
25
 Entropy of Gas @ 25 C 191.5 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 9.082 (J/cm3)^0.5
30
 Liquid Volume 34.677 cm3/mol
31
 Solubility in Water @ 25 C 17.28 parts per million (wt)
32
 Octanol-Water Partition Coefficient , log KOW
-
33
 Henry's Law Constant for Compound in Water @ 25 C 87143.1 atm/mol fraction
34
 Viscosity of Gas @ 25 C 175.44 micropoise
35
 Viscosity of Liquid @ -150 C 0.038 centipoise
36
 Thermal Conductivity of Gas @ 25 C 0.02475 watts/(m K)
37
 Thermal Conductivity of Liquid @ -150 C 0.0646 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 Metals, oxidizing materials
Hazardous decomposition Thermal decomposition product : oxides of nitrogen
Polymerization Will not polymerize.

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

 

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