Gases   
 
     
Helium, He »  
HELIUM  
Name:
Symbol:
Atomic number:
Molecular weight:
Group number:
Group name:
Period number:
CAS Registry ID:  
UN Number(gas):
UN Number(liquid):
Helium
He
2
4.0026 g/mol
18
Rare gas
2
7440-59-7
UN1046
UN1963

Helium (Greek helios meaning "the sun") was isolated by Sir William Ramsay in 1895, from clevite and conclusively found not to be a metal, but the name was unchanged. Helium occurs in economically extractable amounts in certain natural gases and is used as a lifting gas for balloons and blimps, as a cryogenic cooling liquid for super- conducting magnets and as a filler gas for deep-sea diving.

Qualitative performance

HELIUM Gas Purity 99,999 He % ppm
Neon Ne ppm 4,0
Nirogen N2 ppm 1,0
Oxygen O2 ppm 1,0
Carbon oxides CO+CO2 ppm 1,0
Moisture H20 ppm 1,0

HELIUM Liquid Purity 99,9995

He

%

ppm
Neon Ne ppm 1,5
Nirogen N2 ppm 1,5
Oxygen+Argon O2+Ar ppm 0,5
Carbonoxides+Moisture CO+CO2+H20 ppm 1,0

m3
gas
15°C; 1bar
ltr.
liquid
TS 1,013 bar
kg
m3 1 1,336 0,1670
ltr. 0,7485 1 0,1250
kg 0,5988 8,00 1


Physical constants

Chemical Formula He
Molecular weight 4,0026
Denseness of gas at + 20"C 0,166 Kg/m3
Denseness of gas at + 0"C 0,17846 kg/m3
Temperature of boiling -268,8"C (4,2"K)
Denseness of a liquid 125 kg/m3
Bottlenecks:  
Temperature -267,8"C (5,2"K)
Pressure 2,26 technical atmosphere
Denseness 69,3 Kg/m3


Information about cylinders

Type of cylinder Bulk, ltr. Type of a valves Operating pressures, bar Net weight, kg Amount, ltr.
B50 50 DIN 477/6 140 8,28 10.000


Transport data

Chemical Symbol He
CAS Registry ID 7440-59-7
DOT Classification Non-inflammable gas
DOT Label Non-inflammable gas
Hazard class 2.2
UN Number UN 1046
Main Dangers High High Pressure and asthma
Toxility (TLV) Non-toxic gas (asthma)
Range of Flammability (in an air) Non-inflammable gas
Odor Without an odor
Xenon, Xe »
Krypton, Kr »
Neon, Ne »
Argon, Ar »
Octafluorocyclobutane, C4F8 »
Tetrafluoromethane, CF4 »
Sulfur Hexafluoride, SF6 »
Silicon tetrafluoride, SiF4 »
Octafluoropropane, C3F8 »
Propen(Propylen), C3H6 »
Propan, C3H8 »
Butan »
Lasergases »
 
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