Name: helium gas
Nature: colorless and odorless
Molecular Weight:4.003
Density:0.1786g/L
Boiling Point:4.3k
high purity helium gas 99.9995%
Helium gas:
1. nature: is tasteless odorless. Not combustion; or combustion under normal circumstances, is an inert gas
2. useage : it is for lower-temperature superconducting technology and the cold source. Can also used as high vacuum devices, atomic reactors, such as the spacecraft leak detection agents and magnesium. Zirconium, aluminum, titanium and other metal welding the protection of gas.GC also be used for the analysis of the carrier gas. The balloon inflated, with the protection of arc welding gas. Mixed gas diving with the thermometer and gas -filled
He | >= | 99.999% | %V |
N2+Kr | =< | 2 | ppmv |
O2+Ar | =< | 1 | ppmv |
H2 | =< | 1 | ppmv |
Ne | =< | 4 | ppmv |
CO | =< | 0.5 | ppmv |
CO2 | =< | 0.5 | ppmv |
H2O | =< | 3 | ppmv |
THC(CH4) | =< | 0.5 | ppmv |
