Nitrogen dioxide
- NO2
- CAS Number 10102-44-0
- UN1067 (gas)
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Liquid / Gas Volumes
Calculate the volume or mass of a quantity of gas or liquid
Liquid Phase
At boiling point at 1.013 bar
Gas Phase
In standard conditions (1.013 bar, 15°C)
Physical Properties
Molecule phase diagram showing the transition phases between solid, liquid and gas as a function of temperature and pressure
-
- Molar mass 46.006 g/mol
- Content in dry air /
-
Critical Point
- Temperature 158.00 °C
- Pressure 101.325 bar
- Density 557.71 kg/m³
-
Triple Point
- Temperature -11.25 °C
- Pressure 1.8728E-1 bar
Pressure 1.013 bar
| Latent heat of fusion (at melting point) | 318.437 kJ/kg |
| Melting point | - 11.25 °C |
Pressure 1.013 bar
| Boiling point | 21 °C |
| Latent heat of vaporization (at boiling point) | 828.51 kJ/kg |
| Liquid density (at boiling point) | 1447.58 kg/m3 |
Applications
Examples of uses of this molecule in Industry and Healthcare
Chemicals
Nitrogen dioxide is a strong nitrating or oxidizing agent in organic synthesis.
Laboratories & Research Centers
Nitrogen dioxide is used in calibration gas mixtures for petrochemical industry, environmental emission monitoring, industrial hygiene monitors and trace impurity analyzers
Safety & Compatibility
GHS03
Oxidising
GHS04
Gas under pressure
GHS06
Acute Toxicity
GHS05
Corrosive
Threshold of toxicity
| ILV-15min EU (at Patm and 293.15 K) | 1.91 mg/m3 or 1 ppm |
| ILV-8h EU (at Patm and 293.15 K) | 0.96 mg/m3 or 0.5 ppm |
| PEL USA OSHA (vol) | 5 [ceiling] ppm |
| VLEP 8h France (at Patm and 293.15 K) | 0.96 mg/m3 or 0.5 ppm |
| VLEP CT France (at Patm and 293.15 K) | 1.91 mg/m3 or 1 ppm |
Odor
Slightly irritating
Metals
| Aluminium | Not recommended |
| Brass |
Risk of stress corrosion cracking
Not recommended
|
| Monel | No data |
| Copper | No data |
| Ferritic Steel | Satisfactory |
| Stainless steel | Satisfactory |
| Zinc | No data |
| Titanium | No data |
Plastics
| Polytetrafluoroethylene | Satisfactory |
| Polychlorotrifluoroethylene | Satisfactory |
| Polyvinylidene fluoride | Satisfactory |
| Polyvinyl chloride |
Violent reaction (oxidation/burning)
Not recommended
|
| Ethylene tetrafluoroethylene | No data |
| Polycarbonate | No data |
| Polyamide |
Violent reaction (oxidation/burning)
Not recommended
|
| Polypropylene |
Violent reaction (oxidation/burning)
Not recommended
|
Elastomers
| Butyl (isobutene- isoprene) rubber |
Violent reaction (oxidation/burning)
Not recommended
|
| Nitrile rubber |
Violent reaction (oxidation/burning)
Not recommended
|
| Chloroprene |
Violent reaction (oxidation/burning)
Not recommended
|
| Chlorofluorocarbons | No data |
| Silicone |
Violent reaction (oxidation/burning)
Not recommended
|
| Perfluoroelastomers |
Violent reaction (oxidation/burning)
Not recommended
|
| Fluoroelastomers |
Violent reaction (oxidation/burning)
Not recommended
|
| Neoprene | No data |
| Polyurethane |
Violent reaction (oxidation/burning)
Not recommended
|
| Ethylene-Propylene |
Violent reaction (oxidation/burning)
Not recommended
|
Lubricants
| Hydrocarbon based lubricant |
Violent reaction (oxidation/burning) contamination of material
Not recommended
|
| Fluorocarbon based lubricant |
Contamination of material
Not recommended
|
Materials compatibility
Recommendations : Air Liquide has gathered data on the compatibility of gases with materials to assist you in evaluating which materials to use for a gas system. Although the information has been compiled from what Air Liquide believes are reliable sources (International Standards: Compatibility of cylinder and valve materials with gas content; Part 1- Metallic materials: ISO11114-1 (March 2012), Part 2 - Non-metallic materials: ISO11114-2 (April 2013), it must be used with extreme caution and engineering judgement. No raw data such as these can cover all conditions of concentration, temperature, humidity, impurities and aeration. It is therefore recommended that this table is only used to identify possible materials for applications at high pressure and ambient temperature. Extensive investigation and testing under the specific conditions of use need to be carried out to validate a material selection for a given application. Contact the regional Air Liquide team for expertise service.
Learn More
More information
Nitrogen dioxide is a major air pollutant resulting from the reaction between nitrogen monoxide and the oxygen from air.