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China Cas 108-05-4 Nitric Acid CAS 7697-37-2 China Best Price – Chemwin Detail:

Product Name: Nitric acid

Molecular format: HNO3

CAS No.: 7697-37-2

Product molecular structure: 

Nitric acid

Chemical Properties:

Nitric acid is a colorless to light brown fuming liquid with an acrid, suffocating odor. Fuming nitric acid is a reddish fuming liquid. Fumes in moist air. Often used in an aqueous solution. Fuming nitric acid is concentrated nitric acid that contains dissolved nitrogen dioxide. Nitric acid is a solution of nitrogen dioxide, NO2, in water and so-called fuming nitric acid contains an excess of NO2 and is yellow to brownish-red in color.
Colorless liquid; highly corrosive; refractive index 1.397 at 16.5°C; density 1.503 g/L; freezes at –42°C; boils at 83°C; completely miscible with water; forms a constant boiling azeotrope with water at 68.8 wt% nitric acid; the azeotrope has density 1.41 g/mL and boils at 121°C.

Application:

Nitric acid is an important starting material for the production of fertilizers and chemicals. Diluted nitric acid is used for dissolving and etching metals Product DataSheet
This heavy, clear or slightly yellowish fluid is very poisonous and causes severe burns on contact with the skin. It was made by the distillation of an alkali-metal nitrate combined with sulfuric acid. The combination of nitric and sulfuric acids was used to convert plain cotton to cellulose nitrate. Nitric acid was used in the wet plate process as an additive to ferrous sulfate developers to promote a whiter image color for ambrotypes and ferrotypes. It was also added to lower the pH of the silver bath for collodion plates. Adding acid to the silver bath made collodion plates less sensitive to light, which had the beneficial effect of reducing the occurrence non-image fog.


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