99.999% (5N) Krypton Gas, High Purity Krypton Gas

English Name: Krypton
Chemical Formula: Kr
High Purity Krypton Purity: 99.999% (5N)
Packaging: 8L/40L/50L
High Purity Krypton Filling Capacity: Approx. 1M³, 5.5M³, 6M³
Filling Pressure: Approx. 10 MPa, 13.5 MPa, 13.5 MPa
CAS: 7439-90-9

Detailed Parameters of High Purity Krypton

Purity Specifications of High Purity Krypton

Applications of High Purity Krypton

Krypton is a rare gas that is colorless, odorless, non-toxic, and inert. It is concentrated in the atmosphere, accounting for 1.1 ppm. It is mainly used in incandescent bulbs, fluorescent lamps, counting tubes, halogen lamps, meter lamps, high-efficiency fluorescent lamps, laser light sources, ultraviolet sources, standard gases, and special gas mixtures. Krypton has a higher molecular weight and lower thermal conductivity than argon, making it an excellent filling gas. Lamps filled with krypton include incandescent lamps, fluorescent lamps, flash arc lamps, and iodine lamps. Krypton lamps save 20% to 25% energy compared to argon lamps of the same power and have a lifespan 2 to 3 times longer. On airport runways, flash arc lamps filled with krypton are commonly used for lighting due to their strong ability to penetrate fog. Krypton can absorb X-rays and is used as a shielding material during X-ray work. It can also be used to make atomic lamps that do not require electrical energy. Krypton lamps have particularly high transmittance, making them suitable for use in off-road vehicle lights during night operations.

Precautions for High Purity Krypton

Krypton is a colorless, odorless, non-toxic, non-flammable high-pressure gas stored in cylinders. When the krypton concentration increases, causing the oxygen level to drop below 19.5%, it may lead to suffocation. Cylinder-packed krypton is a high-pressure gas and must be减压减压 before use. All cylinders have an expiration date; expired cylinders must be sent to the relevant department for safety inspection before further use. When the gas is nearly depleted, the residual pressure in the cylinder should be maintained at 0.5 MPa, with a minimum of 0.25 MPa. The cylinder valve should be closed to ensure gas quality and usage safety. During transportation, storage, and use, cylinder-packed krypton should be sorted and stacked separately. Flammable gases and oxidizing gases must not be stored together. Keep away from open flames and heat sources. Avoid fire, oil, grease, direct sunlight, rough handling, and impacts. Do not perform arc welding or striking on the cylinder. Avoid rough handling during loading and unloading.

Operate in a closed environment with good natural ventilation. Operators must receive specialized training and strictly follow operating procedures. Prevent gas leakage into the workplace air. Keep away from flammable and combustible materials. Handle with care during transportation to avoid damage to cylinders and accessories. Equip with leakage emergency处理 equipment. Store in a cool, well-ventilated warehouse. Keep away from fire and heat sources. Storage temperature should not exceed 30°C. Store separately from易燃 materials and avoid mixed storage. Generally, no special protection is required. However, when the oxygen concentration in the workplace falls below 18%, an air respirator, oxygen respirator, or long-tube mask must be worn.

Physicochemical Properties of High Purity Krypton

Krypton is a colorless, odorless, and tasteless gas. Boiling point: -153.35°C. It is present in very low concentrations in the atmosphere. Under normal conditions, it is chemically inert and does not react with other elements or compounds. However, when a mixture of krypton and fluorine is subjected to an electric discharge at 84K or irradiated with an electron beam at 123K, KrF2 can be formed. KrF2 is highly unstable and decomposes rapidly at 0°C. KrF4 has also been prepared; it is an unstable colorless solid produced by the action of an electric discharge on the elements at low temperatures.

Molecular Weight: 83.80
Melting Point (73.15 kPa): -157.4°C
Boiling Point (101.325 kPa): -153.4°C
Liquid Density (-153.35°C, 101.325 kPa): 2413 kg/m³
Gas Density (0°C, 101.325 kPa): 3.74 kg/m³
Relative Density (Gas, 25°C, 101.325 kPa): 2.89
Specific Volume (21.1°C, 101.325 kPa): 0.2878 m³/kg
Gas-Liquid Volume Ratio (15°C, 100 kPa): 688 L/L
Critical Temperature: -63.8°C
Critical Pressure: 5490 kPa
Critical Density: 908 kg/m³

Compressibility Factor

Heat of Fusion (-157.20°C, 73.1 kPa): 19.51 kJ/kg
Heat of Vaporization (-153.35°C, 101.325 kPa): 107.81 kJ/kg
Specific Heat Capacity (25°C, 101.325 kPa): Cp=251.04 J/(kg·K)
Cv=150.62 J/(kg·K)
Specific Heat Ratio (Gas, 25°C, 101.325 kPa): Cp/Cv=1.667
Vapor Pressure (112.05K): 53.329 kPa
(155.15K): 1013.250 kPa
(206.65K): 5066.250 kPa
Viscosity (Gas, 0°C, 101.325 kPa): 0.02330 mPa·S
(Liquid, -153.4°C): 0.431 mPa·s
Surface Tension (-150°C): 16.3 mN/m
Thermal Conductivity (0°C, 101.325 kPa): 0.008834 W/(m·K)
(Liquid, -153.4°C): 0.08828 W/(m·K)
Refractive Index (Gas, 0°C, 101.325 kPa, 5893?): 1.00427