Each of us is a specialist in agriculture, and so we know all that is connected with it.Everyone knows about the nitrates, about their benefits and harms.And in fact, what the sodium nitrate?
formula of the substance NaNO3, its other name - Sodium nitrate.In appearance it is a white crystalline substance, sometimes having a grayish or yellowish tint.The water dissolves well.The taste is bitter-salty.It occurs naturally as a mineral - Chilean nitrate.Nitrate hygroscopic, melting point 308 ° C, the expansion (boiling) - 380 °.Strong oxidant releases oxygen at reflux.
Produce sodium nitrate synthesis from ammonia and nitrogen in the air.There are other technologies receiving nitrate are based on the interaction of various reactions and decomposition.Types:
- A - for use in flux when soldering and welding of metals;
- B - for etching metals and alloys clarification.
sodium nitrate must be stored in compressed form in multilayer paper bags.Can be transported by any means other than air, the transport and unloading can not be mixed with organic substances in order to prevent fires.
as it is called, sodium nitrate is widely used in various fields of industry and agriculture.In agriculture, used as nitrogen fertilizer on all types of soil for vegetable crops (potatoes, beets), fruit and berry crops.Since nitrate is a caustic view of fertilizer, use it better in acidic soils.As the fertilizer applied to the soil in the spring, can be used as fertilizer.The positive effect on plants has not only nitrogen, and sodium.
In industry sodium nitrate is used as:
- component solution for pickling stainless steel pipes;
- component of the lubricant on the rolling mills stainless steel tubes;
- bleach when cooking glass;
- an oxidizer in rocket fuel;
- salt component refrigerants.
In the food industry nitrate used as a preservative - E251.There is mention that already in 1397 nitrate was used to preserve fish.This is due to the influence of nitrite formed from nitrates, bacteria.Nitrate used:
- in the manufacture of cheeses;
- at preparation of meat products.Nitrates are under the influence of microorganisms converted into nitrites, which have a protective effect on the products, at the same time giving them the appropriate bright color.
Nitrates can also be used as a solution.The meat is rubbed with a mixture of salt, saltpetre, sugar and placed under oppression.The resulting solution was covered with the meat.
nitrate as an oxidizer used in the pyrotechnic composition.In such compositions, its purpose - to provide oxygen combustion process.
nitrate is used in medicine as a vasodilator.In addition, it relieves intestinal cramps, serves as an antidote to cyanide poisoning, and as a laxative.
Meanwhile nitrate for mammals is considered a toxic substance.At a dosage of 180 mg / kg body weight of rats die half.When E251 engaged in research, it was found that heating to a temperature above 120 ° C leads to the formation of carcinogens.
Studies World Health Organization, it possible to determine the permissible daily dose of nitrates to 3.7 milligrams per kilogram of body weight.The following occurs - when nitrates are in the colon under the action of microorganisms, they are converted into nitrites and the latter entering the blood, hemoglobin is converted to methemoglobin, which can not transport oxygen.
The submission considered sodium nitrate.What is where distributed in nature, as it turns out, and where used in industry;It described its impact on the human body.
