HELIUM
HELIUM
- CAS:
- 7440-59-7
- MF:
- He
- MW:
- 4
Suppliers by country/region
Company Type
Properties
- Melting point:
- -272.2 °C(lit.)
- Boiling point:
- -268.934 °C(lit.)
- Density
- 0.1785（0℃）
- vapor density
- 0.14 (vs air)
- solubility
- slightly soluble in H2O; insoluble in ethanol
- form
- gas
- color
- colorless
- Odor
- at 100.00?%. odorless
- 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]
- Merck
- 13,4645
- Dielectric constant
- 1.0（-269℃）
- Stability:
- Stable; extremely unreactive.
- LogP
- 0.280
Safety Information
- Symbol(GHS)
GHS04
- Signal word
- Warning
- Hazard statements
- H280
- Precautionary statements
- P410+P403
- Safety Statements
- 9
- RIDADR
- UN 1046 2.2
- WGK Germany
- 3
- RTECS
- MH6520000
- F
- 4.5-31
- DOT Classification
- 2.2 (Nonflammable gas)
- HazardClass
- 2.2
Use
Helium is used as an inert gas shield in arc welding, as a lifting gas for lighter-than-air aircraft, and as a gaseous cooling medium in nuclear reactors. It is also used to provide a protective atmosphere for growing germanium and silicon crystals for transistors, to provide a protective atmosphere in the production of such reactive metals as titanium and zirconium, to fill cold-weather fluorescent lamps, to trace leaks in refrigeration and other closed systems, and to fill neutron and gas thermometers. Its thermal conductivity makes it an important gas for lasers and fiber optic production.
12 India supplier list of "HELIUM"
- Product Name:Helium
- Products Intro:Purity: 98% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Reagent
- Country/Region: Gujarat,INDIA
- Product Name:Helium
- Products Intro:Purity: 98% | Package: 1 kg,5 kg, 10 kg,25kg
- Company Type: Manufacturer
- Country/Region: Maharashtra,INDIA
- Product Name:Helium
- Products Intro:Purity: 98% | Package: 1 kg,5 kg, 10 kg,25kg
- Company Type: Manufacturer
- Country/Region: Maharashtra,INDIA
- Product Name:Helium
- Products Intro:Purity: 99% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Manufacturer
- Country/Region: Karnataka,INDIA
- Product Name:Helium
- Products Intro:Purity: 99% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Manufacturer
- Country/Region: New Delhi,INDIA
- Product Name:Helium
- Products Intro:Brand:sigma aldrich | Product Number:768995 | Purity:Messer?CANGas,99.999%
- Company Type: Trader
- Country/Region: Bangalore,INDIA
- Product Name:Helium Gas
- Company Type: Reagent
- Country/Region: Maharashtra,INDIA
- Product Name:Helium Gas
- Company Type: Reagent
- Country/Region: Maharashtra,INDIA
- Product Name:Helium Gas
- Company Type: Reagent
- Country/Region: Mumbai,INDIA
- Product Name:Helium Gas
- Company Type: Reagent
- Country/Region: Kolkata,INDIA