Krypton, Kr
Krypton is a rare atmospheric gas which is colorless, tasteless, odorless, nontoxic, and chemically inert. The concentration of Krypton in the atmosphere by volume percent is 1.1 x 10-4. Krypton is principally shipped and used in gaseous form for excimer lasers, light bulbs, window insulation and R&D laboratory research.
Safety Requirements: The cryogenic liquid will rapidly boil to the gas at standard temperatures and pressures. The liquidfied gas can cause frostbite to any contaminated tissue. The main health hazard associated with release of this gas is asphyxiation by displacement of oxygen (see MSDS for further information).
Krypton Research/Scientific Grade:
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Krypton Research/Scientific Grade Maximum Impurities
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Krypton
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99.999%
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Xenon
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<3.0 ppmv
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Water (H₂O)
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<0.1 ppmv
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Hydrogen
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<0.5 ppmv
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Oxygen
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<0.5 ppmv
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Nitrogen
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<2.0 ppmv
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Total Hydrocarbon Content (THC)
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<0.5 ppmv
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CF₄+C₂F₆+SF₆
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<2.0 ppmv
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CO+CO₂
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<0.5 ppmv
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Physical Constants
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Chemical Name
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Kr
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Molecular Weight
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83.80
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Density of the gas at 70°F (21.1°C), 1 atm
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0.2172 lb/ft³, 3.479 kg/m³
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Specific gravity of the gas at 70°F (21.1°C), 1 atm
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2.899
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Specific volume of the gas at 70°F (21.1°C), 1 atm
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4.604 ft³/lb, 0.287 m³/kg
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Boiling Point at 1 atm
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-244.0°F, -153.4°C
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Melting Point at 1 atm
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-251°F, -157°C
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Critical Temperature at 1 atm
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-82.8°F, -63.8°C
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Critical Pressure
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798.0 psia, 55.02 bar
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Critical Density
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56.7 lb/ft³, 908 kg/m³
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Triple Point
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-251.3°F, -157.4°C
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Latent heat of vaporization at normal boiling point
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46.2 Btu/lb, 107.5 kJ/kg
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Latent heat of fusion at triple point
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8.41 Btu/lb, 19.57 kJ/kg
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Shipping Information
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Shipping Class
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70
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DOT Name
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Krypton
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TC name
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Krypton Compressed
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DOT Class
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2.2 (Nonflammable Gas)
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TC Class
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2.2 (Nontoxic, Nonflammable Gas)
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WHMIS Class
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A
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DOT Label
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Nonflammable Gas
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CAS Registry No.
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7439-90-9
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UN No./IATA No.
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UN1056
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Krypton Specifications pdf. Krypton MSDS pdf.
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