UN1046 Helium High Purity Gases He Gas Controlled Atmospheres

Basic Information
Place of Origin: China
Brand Name: Newradar Gas
Certification: ISO/DOT/GB
Model Number: N/A
Minimum Order Quantity: 50pcs
Price: negotiation
Packaging Details: Packed in10L-50L cylinder or packed according to the demands.
Delivery Time: 30-35 working days after received your payment
Payment Terms: L/C, , T/T, Western Union, MoneyGram
Supply Ability: 1000 pcs per month
Detail Information
Product Name: Helium Gas Purity: 99.9999%
Vaporization Heat: 20.4kJ/kg Solubleness: Insoluble
CAS No.: 7440-59-7 EINECS No.: 275-187-7
Critical Temperature: 5.19K Critical Pressure: 0.228Mpa
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Product Description

UN1046 Helium High Purity Gases He Gas Controlled Atmospheres





Helium is a chemical element with symbol He and atomic number 2. It can be used for gas tungsten arac welding.


Helium is the second least reactive noble gas after neon, and thus the second least reactive of all elements. It is inert and monatomic in all standard conditions. Because of helium's relatively low molar mass, its thermal conductivity, specific heat, and sound speedin the gas phase are all greater than any other gas except hydrogen. For these reasons and the small size of helium monatomic molecules, heliumdiffuses through solids at a rate three times that of air and around 65% that of hydrogen.


Helium is the least water-soluble monatomic gas, and one of the least water-soluble of any gas, and helium's index of refraction is closer to unity than that of any other gas. Helium has a negative Joule-Thomson coefficient at normal ambient temperatures, meaning it heats up when allowed to freely expand. Only below its Joule-Thomson inversion temperature does it cool upon free expansion. Once precooled below this temperature, helium can be liquefied through expansion cooling.


Most extraterrestrial helium is found in a plasma state, with properties quite different from those of atomic helium. In a plasma, helium's electrons are not bound to its nucleus, resulting in very high electrical conductivity, even when the gas is only partially ionized. The charged particles are highly influenced by magnetic and electric fields. For example, in the solar wind together with ionized hydrogen, the particles interact with the Earth's magnetosphere, giving rise to Birkeland currents and the aurora.

Most terrestrial helium present today is created by the natural radioactive decay of heavy radioactive elements, as the alpha particles emitted by such decays consist of helium-4 nuclei. This radiogenichelium is trapped with natural gas in concentrations up to 7% by volume, from which it is extracted commercially by a low-temperature separation process called fractional distillation. Previously, terrestrial helium was thought to be a non-renewable resource because once released into the atmosphere, it readily escapes into space. However, recent studies suggest that helium is produced deep in the earth by radioactive decay, and that large untapped reserves may exist under the Rocky Mountains inNorth America and in natural gas reserves.





1. Physical properties


Commodity High purity helium gas
Molecular Formula He
UN No. UN1046
CAS No. 7440-59-7
Hazardous class for transort 2.2


2. Typical technical data (COA)




Helium % ≥








Impurity Contents

Ne ppm ≤ 4 2 1
  H2 ppm ≤ 1


  O2 ppm ≤ 1 1 0.5
  N2 ppm ≤ 2 1 1
  CO ppm ≤ 0.5 0.2 0.1
  CO2 ppm ≤ 0.5 0.2 0.2
  CH4 ppm ≤ 0.5 0.2 0.1
  H2O ppm ≤ 3 2 1


3. Package


Cylinder Size

Cylinder Content


Gauge Pressure


Outlet Connection


8ltr 1 100bar According to the valve type
40ltr 5.5 135bar According to the valve type
44ltr 6 150bar CGA580
47ltr 7 165bar CGA580
Other sizes are also available





Controlled Atmospheres protective gas in growing silicon and germanium crystals, in titanium andzirconium production, and in gas chromatography
Gas tungsten arc welding

One industrial application for helium is leak detection. Because helium diffuses through solids three times faster than air, it is used as a tracer gas to detect leaks in high-vacuum equipment and

high-pressure containers


Airships and balloons are inflated with helium for lift.

Another minor use is in rocketry, where helium is used as an ullage medium to displace fuel and oxidizers in storage tanks and to condense hydrogen and oxygen to make rocket fuel

Minor commercial and recreational uses Helium as a breathing gas has no narcotic properties, so helium mixtures such as trimix, heliox and heliair are used for deep diving to reduce the effects of narcosis

Scientific uses


The use of helium reduces the distorting effects of Temperature variations in the space between lenses in some telescopes,due to its extremely low index of refraction.


UN1046 Helium High Purity Gases He Gas Controlled Atmospheres 0

Contact Details

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