Ammonium nitrate is included in a group of the most important nitrogenous fertilizers.Nitrogen performs a crucial role in the life of plants.This substance is included in the composition of chlorophyll, which is an acceptor protein and solar energy that is necessary for constructing the living cell.
Plants are able to consume a fixed nitrogen in the form of amides, ammonium salts and nitrates.A relatively small amount of a substance produced by the functioning of soil microorganisms.It should be noted that modern agriculture can not exist without the introduction of fertilizer nitrogen group, which originate from industrial atmospheric nitrogen fixation.The blends included in this category are different from each other in the form of compounds of the phase (liquid or solid).There are also physiologically alkaline and acidic fertilizer.
Ammonium nitrate, which is a formula NH4NO3, is a white crystalline substance which contains thirty-five percent of the nitrogen in nitrate and ammonium form.Both of these forms quite easily absorbed by plants.Granulated ammonium nitrate used in large volumes to the sowing works and as top dressing.In smaller amounts it is used in the manufacture of explosives.
Ammonium nitrate can be of different types.Types A and B, for example, are used for industrial purposes, in explosive mixtures (ammonal, ammonites).
for fertilizer applied ammonia and nitric acid.The molecular weight of this material 80,043 amuPure ammonium nitrate contains sixty percent oxygen, hydrogen five percent and thirty-five percent nitrogen (technical product nitrogen fraction not less than thirty-four percent).
Depending on the temperature, there are five versions of crystalline substances.All are thermodynamically stable at atmospheric pressure.Each modification has its own specific temperature range and polymorphic transition imply a change of the crystal structure, the absorption or release of heat, abrupt changes in specific volume, entropy, heat capacity and so on.Such transformations are considered enantiotropically - reversible.
Ammonium nitrate is an oxidizing agent and is capable of supporting combustion.In the case where the thermal decomposition products are not able to freely removed, the substance can detonate (explode) under certain conditions.
When exposed to elevated temperature (two hundred ten - hundred twenty degrees) in the closed space, ammonia accumulates, the concentration of nitric acid is lowered.In this regard, there is a significant decrease in the decomposition reaction.Thermal decomposition is almost stopped.When exposed to a greater temperature is more rapid oxidation of ammonia, the reaction accumulating substance starts to flow with considerable acceleration.It can also trigger an explosion.
