Application | Material safety data sheet


SECTION 8 PHYSICAL AND CHEMICAL PROPERTIES
1
 Name HYDROGEN
2
 Formula H2
3
 CAS Number 1333-74-0
4
 Molecular Weight 2.016
5
 Melting point 13.95 K , -259.2 C , -434.56 F
6
 Boiling point @ 101.325 kPa (1 atm) 20.39 K , -252.76 C , -422.97 F
7
 Critical Temperature 33.18 K , -239.97 C , -399.95 F
8
 Critical Pressure 13.13 bar , 12.96 atm , 190.43 psia
9
 Critical Volume 64.15 cm3/mol
10
 Critical Density 0.0314 g/cm3
11
 Critical Compressibility Factor 0.305
12
 Acentric Factor -0.220
13
 Density of Liquid @ -250 C 0.067 g/cm3
14
 Coefficient of thermal Expansion of Liquid @ 25 C 0.0209 1/C
15
 Surface Tension @ -259 C 2.99 dynes/cm
16
 Density of Gas @ 1 atm and 70 F (21.1 C) 0.083 kg/m3 , 0.0052 lb/ft3
17
 Relative Density of Gas @ 1 atm and 70 F (Air =1) 0.07
18
 Enthalpy of Vaporization @ Boiling Point 228.17 kJ/kg , 98.11 BTU/lb
19
 Enthalpy of Fusion @ Melting Point 58.04 kJ/kg , 24.96 BTU/lb
20
 Heat Capacity of Gas @ 25 C , Constant Pressure (CP) 14.268 kJ/(kg K) , 3.41 BTU/(lb R)
21
 Heat Capacity of Gas @ 25 C , Constant Volume (CV) 10.144 kJ/(kg K) , 2.424 BTU/(lb R)
22
 Ratio of Heat Capacities for Gas , CP/CV 1.407
23
 Heat capacity of Liquid @ -253 C 9.457 kJ/(kg K) , 2.26 BTU/(lb R)
24
 Heat capacity of Solid @ -260 C 2.842 kJ/(kg K ) , 0.679 BTU/(lb R)
25
 Entropy of Gas @ 25 C 130.57 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 6.648 (J/cm3)^0.5
30
 Liquid Volume 28.604 cm3/mol
31
 Solubility in Water @ 25 C 1.53 parts per million (wt)
32
 Octanol-Water Partition Coefficient , log KOW
-
33
 Henry's Law Constant for Compound in Water @ 25 C 70832.1 atm/mol fraction
34
 Viscosity of Gas @ 25 C 88.05 micropoise
35
 Viscosity of Liquid @ -250 C 0.011 centipoise
36
 Thermal Conductivity of Gas @ 25 C 0.17064 watts/(m K)
37
 Thermal Conductivity of Liquid @ -250 C 0.1314 watts/(m K)
38
 Lower Explosion Limit in Air 4 vol %
39
 Upper Explosion Limit in Air 75 vol %
40
 Flash Point Temperature
-
41
 Autoignition Temperature 400 C , 752 F
42
 Enthalpy of Combustion @ 25 C (77 F) 119950.4 kJ/kg , 51578.7 BTU/lb
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 Avoid heat, flames, sparks and other sources of ignition. Minimize contact with material. Containers may rupture or explode if exposed to heat.
Incompatibilities Metals, oxidizing materials , metal oxides , combustible materials , halogens , metal salts , halo carbons
Hazardous decomposition Thermal decomposition product : miscellaneous decomposition products
Polymerization Will not polymerize.

SECTION 10 TRANSPORT INFORMATION
Proper shipping name Hydrogen , compressed
Labeling requirements Flammable gas

 

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