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Krypton
| Description
Krypton is a chemical element with the symbol Kr and atomic number 36. It is a member of Group 18 and Period 4 elements. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere, is isolated by fractionally distilling liquified air, and is often used with other rare gases in fluorescent lamps. Krypton is inert for most practical purposes. Krypton can also form clathrates with water when atoms of it are trapped in a lattice of the water molecules.
| Usage
- Illumination (fluorescent lamps, incandescent lamps), PDP TV
- Insulation glasses, lasers (krypton fluorde laser)
- Magnetic resonance imaging (MRI)
| Physical Properties
| Symbol |
Kr |
| Molecular |
83.80 |
| Gas density (kg/m3) at 0°C, 1atm |
3.74 |
|
Liquid density (kg/L) at boiling point
|
2.413 |
|
Boiling point (°C)
|
-153.4 |
|
Melting point (°C)
|
-156.6 |
|
Critical temperature (°C)
|
-62.5 |
| Critical pressure (atm) |
54.0 |
| Color, Odor |
None |
| Quality
| Purity |
O2
|
N2
|
H2
|
Ar
|
Xe
|
T.H.C
|
CO2
|
CO
|
H2O
|
| ≥99.999% |
≤0.5 |
≤2 |
≤1 |
≤2 |
≤2 |
≤0.2 |
≤0.5 |
≤0.3 |
≤1 |
| Supply
| Cylinder size |
40 ~ 50 L |
|
Contents
|
5,000 ~ 10,000 L |
|
Valve type
|
CGA 580, JIS 22mmR, KS 22mmR |
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