Helium | CAS No. 7440-59-7
Basic Information
CAS Number
7440-59-7
Molecular Formula
He
Molecular Weight
4.00 g/mol
EINECS
231-168-5
Quick Actions
Basic Physical Properties
Melting Point
-272.2°C(lit.)
Boiling Point
-268.934°C(lit.)
Density
0.1785（0℃）
Water Solubility
8.61mL/1000g H2O (101.32kPa, 0°C) [KIR78]; Henry’s law constants, k×10?4: 9.856 (104°C), 6.739 (149.4°C), 2.524 (250.6°C), 1.796 (275.1°C) [POT78]
Flash Point
none
Vapor Density
0.14 (vs air)
Classification & Uses
Safety Information
Hazard Class
2.2
Stability
Stable; extremely unreactive.
Synonyms & References
English
- HELIUM
- HYDROGEN AND HELIUM
- HYDROGEN-HELIUM
- LEAK DETECTION STANDARD LD-3
- atomichelium
- He
- helium,compressed
- Primarily commercial liquefaction plants
- Helium
- Helium,highpurity
- Helium-4
- o-Helium
- p-Helium
- Atomic helium
EC_Number
231-168-5
CAS Number
7440-59-7
Customs_Code
2804290000
Merck_Index
13,4645
Recommended Suppliers
| Supplier Name | Member Level | Authentication Status | Main Category | MOQ | Action |
|---|---|---|---|---|---|
 Germany - PRelectronics GmbH |
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 China - Huai'e Jiu Xin Chemical Industry Co., Ltd. |
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| China - Henan Senyuan Technology Co., Ltd. |
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| China - Gongyi City Jiaxin Water Purification Materials Co., Ltd. |
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| China - Yunnan Chemical Industry Machinery Co., Ltd. |
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| Germany - quattro research GmbH |
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| Germany - Outotec GmbH |
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| China - Hanzhong Tianxiang Mining Co., Ltd. |
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