Nitric acid / HNO₃

Nitric acid

Gas Identification

Other denomination
Nitric acid
CAS Registry Number
SCBA type

Chemical properties

Molecular formula
Molecular mass
63 g/mol

Physical properties

Boiling point
83 °C
Autoignition temperature
Gas/Vapour density
11,95 eV

Flammability limit


Threshold limit value

1 ppm • 2,6 mg/m³

Nitric acid : Description and use


Nitric acid is a strong mineral acid. It was called azotic acid by 19th century chemists, spirit of niter by alchemists, or even "strong water" or aquae fortis by copper engravers.
In its pure form, it is a colourless-to-yellow liquid and at 70% it has an acrid odour. It is used in concentrated aqueous solutions.

Flammability: Nitric acid is not flammable. However, it reacts violently (even combusting and exploding) with a vast amount of organic and mineral compounds, as well as with combustibles and metals in the form of powder.

  • To manufacture nitrogen fertilisers, various mineral nitrates and nitro compounds
  • To manufacture explosives
  • Metallurgical industry (refining, photoengraving)
  • Pharmaceutical industry Textile industry Oxidisation agent

Nitric acid : Warnings and caution

GHS hazard statements

H272 - May intensify fire; oxidiser.
H290 - May be corrosive to metals.
H314 - Causes severe skin burns and eye damage.
H331 - Toxic if inhaled.
EUH071 - Corrosive to the respiratory tract.

GHS precautionary statements

P220 - Keep/Store away from clothing/.../combustible materials.
P260 - Do not breathe dust/fumes/gas/mist/vapours/spray.
P280 - Wear protective gloves/protective clothing/eye protection/face protection.
P305+P351+P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P310 - Immediately call a POISON CENTRE or doctor/physician.
P302+P352 - IF ON SKIN: Wash with plenty of soap and water.

SGH06 : Toxique
SGH05 : Corrosif
SGH03 : Comburant

Nitric acid : Related products

Aucun produit disponible n'est actuellement lié à la détection de ce gaz.