Nitrogen N2
Nitrogen: Liquid nitrogen is a compact and readily transported source of nitrogen gas without pressurization. Further, its ability to maintain temperatures far below the freezing point of water makes it extremely useful in a wide range of applications, primarily as an open-cycle refrigerant, including:
- as a coolant for CCD cameras in astronomy
- to store cells at low temperature for laboratory work
- in cryogenics
- as a source of very dry nitrogen gas
- for the immersion, freezing and transportation of food products as a method of freezing water pipes in order to work on them in situations where a valve is not available to block water flow to the work area - nowadays replaced by electrical heat pumps.
Properties :
- Non-flammable
- Non-toxic
- Odourless
- Colourless
| Gas quality | Impurities | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
GRADE 2
N5.0 99.999% |
|
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| GRADE 1 N5.5 99.999% |
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| RESEARCH N6.0 99.9999% |
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| Chemical formula | : | N2 |
| Molecular weight | : | 28.01 g/mol |
| Boiling point at 1.013 bar | : | -195.80 0C |
| Gas density, absolute | : | 1.185 kg/m3 (15 0C, 1.013 bar) |
| Gas density, relative air | : | 0.97 |
| Cylinder connection | : | BS Standard or CGA on request |
| Cylinder colour | : | Green |
