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Acide nitrique


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Name Acide nitrique EINECS 231-714-2
CAS No. 12507-77-6 Density 1.623 g/cm3
Solubility Melting Point
Formula HNO3 Boiling Point 83 °C at 760 mmHg
Molecular Weight 63.0128 Flash Point
Transport Information Appearance
Safety Risk Codes
Molecular Structure Molecular Structure of 12507-77-6 (Acide nitrique) Hazard Symbols



The Acide nitrique, with the CAS registry number of 12507-77-6, is also known as  Aqua fortis. This chemical's molecular formula is HNO3 and molecular weight is 63.01. What's more, its IUPAC name is Nitric acid. Acide nitrique is a highly corrosive and toxic strong acid. Colorless when pure, older samples tend to acquire a yellow cast due to the accumulation of oxides of nitrogen. If the solution contains more than 86% Nitric acid, it is referred to as fuming Nitric acid.

Physical properties about Acide nitrique are: (1)# of Rule of 5 Violations: 0; (2)ACD/BCF (pH 5.5): 1; (3)ACD/BCF (pH 7.4): 1; (4)#H bond acceptors: 4; (5)#H bond donors: 1; (6)#Freely Rotating Bonds: 0; (7)Polar Surface Area: 66.05 Å2; (8)Index of Refraction: 1.409; (9)Molar Refractivity: 9.606 cm3; (10)Molar Volume: 38.82 cm3; (11)Surface Tension: 58.652 dyne/cm; (12)Density: 1.623 g/cm3; (13)Enthalpy of Vaporization: 37.722 kJ/mol; (14)Boiling Point: 83 °C at 760 mmHg; (15)Vapour Pressure: 49.828 mmHg at 25 °C.

Preparation of Acide nitrique: 
(1)Acide nitrique is made by reacting Nitrogen dioxide (NO2) with water.
3NO2 + H2O → 2HNO3 + NO
(2)Normally, the Nitric oxide produced by the reaction is reoxidized by the Oxygen in air to produce additional Nitrogen dioxide. Bubbling Nitrogen dioxide through Hydrogen peroxide can help to improve acid yield.
2NO2 + H2O2 → 2HNO3
(3)Almost pure Acide nitrique can be made by adding Sulfuric acid to a nitrate salt, and heating the mixture with an oil bath. A condenser is used to condense the Acide nitrique fumes that bubble out of the solution.
2NaNO3 + H2SO4 → 2HNO3 + Na2SO4
(4) In laboratory, Acide nitrique can be made from copper(II) nitrate or by reacting approximately equal masses of a nitrate salt with 96% sulfuric acid (H2SO4), and distilling this mixture at Acide nitrique's boiling point of 83 °C until only a white crystalline mass, a metal sulfate, remains in the reaction vessel. The red fuming Acide nitrique obtained may be converted to the white Acide nitrique.
H2SO4 + NO3 → HSO4 (s) + HNO3(g)

Uses: the main use of Acide nitrique is for the production of fertilizers; other important uses include the production of explosives, etching and dissolution of metals, especially as a component of aqua regia for the purification and extraction of gold, and in chemical synthesis.

You can still convert the following datas into molecular structure:
(1) SMILES: [N+](=O)(O)[O-]
(2) InChI: InChI=1/HNO3/c2-1(3)4/h(H,2,3,4)

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