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Kr Krypton gas

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Krypton gas is a rare gas, colorless, tasteless, non-toxic, inert, krypton gas concentrated in the atmosphere. It occupies 1.1 parts per million in the atmosphere. Boiling point -153.35℃, the atmosphere is very low in krypton (trace, 1.14×10-6 by volume). It does not burn or aid in combustion. It absorbs x-rays. The relative density of gas is 3.736(-152.9℃) and that of liquid is 2.155. Melting point -156.6℃,boiling point (-152.3±1.0 ℃). The critical temperature is -63.81℃, and the critical pressure is 55×105Pa. It has the properties of high density, low thermal conductivity and high transmittance.

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Product Parameters

Other names :	Krypton
MF:	Kr
Formula weight :	83
Density:	3.74kg/m³
CAS No:	7439-90-9
EINECS No:	231-098-5
UN No:	UN1950
Purity:	99.99%-99.9999%
Appearance:	Colorless

Specifications

Component	Specification	Concentration
KRYPTON	100.00%	>99.999%
HYDROGEN(H2)	≤0.5 ppm	≤0.5 ppm
OXYGEN+AIR (O2+Ar)	≤1.5 ppm	≤1.5 ppm
NITROGEN (N2)	≤2.0ppm	≤2.0 ppm
CARBON MONOXIDE (CO)	≤0.3ppm	≤0.3ppm
CARBON DIOXIDE(CO2)	≤0.4ppm	≤0.4 ppm
CH4	≤0.3 ppm	≤0.3 ppm
XENON(Xe)	≤2.0 ppm	≤2.0 ppm
MOISTURE (H2O)	≤2.0 ppm	≤2.0 ppm
TETRAFLUOROMETHANE (CF4)	≤1.0 ppm	≤1.0 ppm

Physical Properites

Chemical name	kr
Molecular weight	83.8
Density of the gas at 70°F (21,1°C), 1 atm	0.2172 lb/ft3, 3.479 kg/m3
Specific gravity of the gas at 70°F (21 ,1°C), 1 atm	2.899
Specific volume of the gas at 70ºF (21,1°C), 1 atm	4.604 ft3/lb, 0.287 m3/kg
Boiling point at 1 atm	-244.0ºF, -153.4ºC
Melting point at 1 atm	-251º F, -157ºC
Critical temperature at 1 atm	-82.8ºF, -63.8ºC
Critical density	56.7 lb/ft3, 908 kg/m3
Critical pressure	798.0 psia, 55.02 bar
Triple point	-251.3ºF, -157.4ºC
Latent heat of vaporization at normal boiling point	46.2 Btu/lb, 107.5 kJ/kg
Latent heat of fusion at triple point	8.41 Btu/lb, 19.57 kJ/kg
Specific heat of the gas at 70ºF (21,1°C), 1 atm Cp	0.060 Btu/(lb) (ºF) 0.251 kJ/(kg) (ºC)
Cv	0.035 Btu/(lb) (ºF) 0.146 kJ/(kg) (ºC)

Application Program

Krypton gas, also known as Kr, is a colorless, odorless gas with several applications. One of its primary uses is as a filling gas in energy-efficient fluorescent light bulbs and other lighting applications. Krypton gas helps to improve the bulbs' efficiency and longevity by reducing the evaporation of tungsten filaments and improving the bulb's color rendering properties.In addition to lighting, krypton gas is also used in some types of lasers, particularly those used for scientific research and industrial applications. Its unique properties, such as its high energy density and ability to produce a narrow spectral line, make it an ideal candidate for these applications. Moreover, krypton gas is used in some types of welding, particularly in high-speed welding applications. Krypton gas can provide a stable and consistent plasma, which can help to improve the quality and speed of the welding process.