Helium (He)
Helium
Formula: He
CAS No: 7440-59-7
Helium (He) is a colorless, odorless, non-flammable, and inert gas. It is the second lightest element and possesses unique physical properties including low density, low solubility, and the lowest boiling point of any element. These characteristics make helium essential across industries ranging from advanced manufacturing to cryogenics, aerospace, and research.
Helium’s inertness, high thermal conductivity, and extremely low liquefaction temperature make it ideal for applications requiring contamination-free environments, cryogenic cooling, and precision processing. In semiconductor manufacturing, helium is critical for purge and carrier gas applications, plasma processes, and leak detection.
Applications include:
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Carrier and purge gas in semiconductor and electronics manufacturing.
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Plasma processing gas for etching and deposition.
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Leak detection in high-vacuum and pressurized systems.
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Cooling medium for superconducting magnets in MRI machines and particle accelerators.
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Shielding gas for arc welding to protect molten metal from oxidation.
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Lifting gas for blimps, weather balloons, and research instrumentation.
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Breathing gas mixtures (heliox) for deep diving.
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Lighting and electronics gas mixtures for neon signs, electronic tubes, and specialized lamps.
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Pressurization and leak testing of aerospace propellant tanks.
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Controlled-atmosphere processes in fiber optics and precision welding.
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Research and laboratory applications, including gas chromatography and inert-atmosphere gloveboxes.
EFC Gases & Advanced Materials supplies ultra-high-purity helium to meet the stringent needs of semiconductor, electronics, aerospace, medical, and research sectors. Our advanced purification systems, rigorous analytical verification, and specialized packaging ensure consistent quality and reliable delivery from production to point-of-use.
Applications
Specifications
Further Specifications
Cylinder Sizes
- Purge and carry gases in semiconductor manufacturing.
- Process wafers in plasma etching and deposition.
- Detect leaks in high-vacuum and pressurized systems.
- Cool superconducting magnets in MRI and research.
- Shield molten metal in arc welding.
| Grade 5 | Grade 6 | |
|---|---|---|
| Purity | 99.999% | 99.9999% |
| Nitrogen | < 3 ppmv | < 400 ppbv |
| Oxygen | < 2 ppmv | < 50 ppbv |
| Carbon Dioxide | < 1 ppmv | < 100 ppbv |
| Carbon Monoxide | < 1 ppmv | < 50 ppbv |
| Methane | < 1ppmv | < 100 ppbv |
| Water | < 3 ppmv | < 200 ppbv |
| Chemical & Physical Properties | |
|---|---|
| Molecular Weight | 4.00 |
| Sp. Volume | 97.1 cu.ft/lb |
| Pressure @ 70°F | 2,000 - 2,490 |
| Valve Outlet | CGA 580 DISS 718 |
| Shipping Information | |
|---|---|
| DOT Name | Helium, Compressed |
| Hazard Class | 2.2 |
| DOT No. | UN 1046 |
| DOT Label | Non-Flammable Gas |
| CAS No. | 7440-59-7 |
| Cylinder Size | Fill Volume (cu ft) |
|---|---|
| Tube Trailer | 180,000 |
| 49L/Size 300 | 291 |
Moisture level guaranteed only when EFC Gases & Advanced Materials prepares the cylinders.
All concentrations are on a mol/mol basis unless otherwise stated. Product sold on the basis of total impurities. Individual impurities may vary slightly.
