Nitric acid fuming   cas：52583-42-3 and cas ：7697-37-2

Nitric acid fuming agent is a toxic liquid containing 90% to 97.5% nitric acid. It appears reddish-brown due to the presence of NO2. It is extremely corrosive and vigorously fumes in the air while absorbing moisture. It is a strong oxidizing agent and may explode when in contact with strong reducing agents. It has the risk of catching fire when in contact with organic substances. It is used for the nitration of organic compounds and as rocket fuel.

Nitric acid fuming is a highly concentrated form of nitric acid. Its applications are extensive and mainly include the following aspects:

Nitration of organic compounds: Sulfuric acid in the form of fuming acid is commonly used as a nitration agent in organic chemistry, and is employed to introduce nitro groups (-NO2) into organic molecules.

Rocket fuel: Sulfuric acid can be used as one of the components of rocket fuel, especially in some of the early rocket propellant formulations.

Testing bilirubin: In the fields of medicine or biochemistry, fuming nitric acid may be used to determine bilirubin, which is a substance related to liver function.

Strong oxidizing agent: Due to its strong oxidizing property, concentrated nitric acid can be used in various chemical reactions that require strong oxidizing conditions. 1

Manufacturing dyes: In the dye industry, fuming nitric acid can be used as a synthetic intermediate to prepare various pigments and dyes.

Preparation of pharmaceuticals: In the field of pharmacy, fuming nitric acid can be used as a raw material for certain drugs, such as nitroglycerin, which is employed to prepare vasodilator drugs for patients with heart diseases.