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Nitric Acid

Molecular Formula : HNO3

UN Number : 3264

CAS Number : 7697-37-2

Hazardous Class: 8

Grade : Industrial Grade

HS Code :2808 00 00
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Product  Description

A colorless or yellow fuming liquid with a asphyxiating odor. In the air to form a yellow to brown-red mist of gas. It can be freely miscible with water. Relative density L 503 l melting point -42 ℃, boiling point 83 ℃. Nitric acid is unstable, when light or heat will decompose and release nitrogen dioxide, which appears light yellow. Concentrated nitric acid is a strong oxidant, in case of organic matter, wood, etc. can cause combustion. Concentrated nitric acid containing trace oxides can react with almost all metals except aluminum and chromium-containing special steels, which can be passivated by concentrated nitric acid. The reaction with ethanol, turpentine, Coke, organic debris is very intense.


Use

nitric acid is a strong oxidizing acid and has a corrosive effect on most metals. High concentration of nitric acid has a passivation effect on metals. Nitric acid is used to clean carbon steel, stainless steel, copper, brass, carbon steel a stainless steel equipment, can remove scale, rust, a-Fez 03 and magnetic Fe3 04 has a good dissolution force. In the process of biological wastewater treatment, it can be used as a nitrogen source in microbial nutrients. In addition, nitric acid is widely used in the manufacture of chemical fertilizers, chemical fibers, pharmaceuticals, dyes, rubber, etc., in the national defense industry, metallurgical industry, printing and dyeing industry and other industrial sectors, it is also an indispensable and important analytical chemical reagent.


Safety

nitric acid is toxic, Burns and erodes the mouth, esophagus and stomach, causing chest tenderness, Shock and death. Prolonged exposure to nitric acid vapor, can cause chronic bronchitis, chemical Pneumonia. Therefore, in the contact and use of nitric acid should be protected from nitric acid or its vapor into the body. The maximum allowable concentration of nitric acid in air is 5 mg/ml. It shall not be stored and mixed with organic matter, oxidant, combustible material, strong alkali, calcium carbide, metal powder, etc.

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