It is a very inert element. Neon forms an unstable hydrate. In a vacuum discharge tube, neon glows reddish orange. Of all the rare gases, the discharge of neon is the most intense at ordinary voltages and currents. It is present in the atmosphere as 1 par.
Neon is present to a small extent in the atmosphere and is obtained as a byproduct from the liquefaction and separation of air. This would not normally be carried out in the laboratory and neon is available commercially in cylinders under pressure.
Neon is used in making neon advertising signs, which accounts for its largest use. Used to make high-voltage indicators, lightning arrestors, wave meter tubes, and TV tubes. Neon and helium are used in making gas lasers.
Liquid neon is an economical cryogenic refrigerant. It has over 40 times more refrigerating capacity per unit volume than liquid helium and more than three times that of liquid hydrogen. It is compact, inert, and less expensive than helium.
| Product | Denomination | Standard articles | Impurities, no more | Total impurities, no more | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Neon | Ne 5.0 UHP | Ne | ≤ | 99.999 | vol.% | He | ≤ | 5 | ppm | ≤ | 10 | ppm |
| - | N2 | ≤ | 2 | ppm | - | - | - | |||||
| - | H2 | ≤ | 1 | ppm | - | - | - | |||||
| - | O2 | ≤ | 1 | ppm | - | - | - | |||||
| - | THC | ≤ | 0.5 | ppm | - | - | - | |||||
| - | CO | ≤ | 1 | ppm | - | - | - | |||||
| - | CO2 | ≤ | - | - | - | - | - | |||||
| - | H2O | ≤ | 0.5 | ppm | - | - | - | |||||
| Neon | Ne 5.5 UHP | Kr | ≥ | 99.9985 | vol.% | He | ≤ | 1 | ppm | ≤ | 5 | ppm |
| - | N2 | ≤ | 1 | ppm | - | - | - | |||||
| - | H2 | ≤ | 0.5 | ppm | - | - | - | |||||
| - | O2 | ≤ | 0.3 | ppm | - | - | - | |||||
| - | THC | ≤ | 0.3 | ppm | - | - | - | |||||
| - | CO | ≤ | 0.1 | ppm | - | - | - | |||||
| - | CO2 | - | 0.1 | ppm | - | - | - | |||||
| - | H2O | ≤ | 0.5 | ppm | - | - | - | |||||
| Neon Liquide | Ne 4.85 L | Kr | ≥ | 99.9985 | vol.% | He | ≤ | 8 | ppm | ≤ | 15 | ppm |
| - | N2 | ≤ | 2 | ppm | - | - | - | |||||
| - | H2 | ≤ | 1 | ppm | - | - | - | |||||
| - | O2 | ≤ | 1 | ppm | - | - | - | |||||
| - | THC | ≤ | 0.5 | ppm | - | - | - | |||||
| - | CO | ≤ | 1 | ppm | - | - | - | |||||
| - | CO2 | - | - | - | - | - | - | |||||
| - | H2O | ≤ | 1 | ppm | - | - | - | |||||
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