Nitrate of magnesium

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Nitrate magnesium

Nitrate magnesium Mg(NO3)2 is a colourless hygroscopic crystals with a cubic lattice (a = 0,748 nm spaces. group PA3); melting point, 426 °C (with decomposition); C°R 141,9 j/(mol. K); DH0обр -792,8 kJ/mol, DG0обр -591,4 kJ/mol. Above 300 °C begins to decompose into MgO, and oxides of nitrogen. Solubility in water (g / 100 g): 73,3 (20 °C), 81,2 (40 °C), 91,9 (60 °C). Also soluble in ethanol, methanol, liquid NH3. From aqueous solutions depending on concentration kristallizuetsya Nona-, hexa - and dihydrate.

Magnesium nitrate forms N2O4 adduct of composition Mg(NO3)2.N2O4 that decomposes above 50 °C, and Amini [Mg(NH3)J(NO3)2 and double salts with the nitrates of other metals. Anhydrous magnesium nitrate is produced by interaction of Mg with N2O4 with subsequent the removal of N2O4, the hydrated reaction with MgO or MgCO3 with dilute HNO3. Hexahydrate — starting compound in the synthesis of MgO of high purity, nitrate etc. metals and the decomposition of connection Mg.

30-40% solutions of magnesium nitrate technical purity, obtained nitric acid decomposition of magnesium raw materials (often caustic magnesite or brucite) found application in the manufacture of concentrated nitric acid (as dehydrating agent) and granulated ammonium nitrate (as a modifier Supplement).

Fertilizer granular magnesium nitrate – magnesium nitrate, a magnesium nitrate – source of available magnesium and nitrogen, which are necessary for normalization and improve the development of plants. Has a low conductivity and high solubility. Magnesium nitrate is used for foliar feeding, fertigation – fertilizing with irrigation water and fertilizers are groundless cultures. In contrast to magnesium sulfate magnesium nitrate does not cause burns on vegetable crops, and can also be used in conjunction with calcium nitrate. The magnesium nitrate is very effective for all crops on sandy and sandy loam soils.

Component complex fertilizers, as magnesium is part of chlorophyll, which necessary for photosynthesis, promotes the activity of many enzymes and acts as a Transporter of phosphorus. High solubility and low the electrical conductivity makes the product suitable for sheet feeding and fertigation, especially when using irrigation water with high the concentration of salts.

Fertilizer used for root and foliar nutrition of vegetable, berry, fruit crops of grapes; an oxidizer in pyrotechnic compositions. The use of nitrate of magnesium as fertilizer in crystalline or granular forms, although the content in its composition two nutrient components in water-soluble the form - in fact, magnesium and nitrogen ( as nitrate ion), and high agrochemical efficiency, it significantly limits the significant hygroscopicity of the product, and increased susceptibility to caking when the storage and transportation.

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