Krypton is a colorless, odorless and tasteless gas. The boiling point is -153.35℃, and the content of krypton in the atmosphere is extremely low (1.14×10-6 by volume), so that the price is also extremely high. Krypton is chemically inert under all normal conditions. It does not combine with other elements or compounds.
Krypton is obtained from air separation plants. In view of its very low natural concentration in air, it is only economically viable to recover krypton from larger plants. In these cases a stream containing a mixture of crude krypton and xenon is extracted from the plant and processed in a separate purification and distillation system.
| Gas | Krypton |
| CAS No. | 7439-90-9 |
| Purity | 99.999% |
Krypton is used in various research programmes. In laboratories krypton is used for calibration standards for mass spectrometry and specific area measurements in adsorption applications.
Krypton is used for certain ion lasers and in mixtures with halides and helium of neon for excimer laser applications.
Krypton is used in incandescent lamps, mixed with nitrogen and argon or nitrogen, argon and xenon. Krypton is also used in mixtures with argon as a filing gas for fluorescent tubes. Krypton is used as a filing gas for various halogen lamps, such as those used in cars, on airfields and in low voltage display lamps.
In neurology krypton is used to obtain brain X-ray
Krypton is used as a triggering agent in discharge type electronic tubes (e.g., FT screens; TFT LCD = Thin-Film Transistor Liquid Chrystal Display).
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