Calcium Nitrate

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calcium nitrate

[′kal·se·əm ′nī‚trāt]
(inorganic chemistry)
Ca(NO3)2·4H2O Colorless, monoclinic crystals that are soluble in water; the anhydrous salt is very deliquescent; used as a fertilizer and in explosives. Also known as nitrocalcite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Calcium Nitrate


(also called nitrocalcite, lime saltpeter, Norge niter), Ca(NO3)2⋅4H2O, a salt; colorless crystals that dissolve in water of crystallization at 42.7°C. Calcium nitrate crystallizes into an anhydrous salt at temperatures above 51.1°C. Its density is 2.36 g/cm3. Because it is highly hygroscopic, it must be stored under moisture-free conditions. The solubility of anhydrous calcium nitrate is 127 g per 100 g H2O at 20°C. Calcium nitrate is obtained by treating limestone with weak nitric acid; it is also formed during the absorption of nitrogen oxide by milk of lime.

Calcium nitrate is used as a nitrogen fertilizer in agriculture and is produced in granulated form. Commercial products contain no less than 15.5 percent nitrogen; furthermore, 4-7 percent ammonium nitrate is added during production in order to reduce the hygroscopicity of the fertilizer; the moisture content should not exceed 15 percent. Calcium nitrate is applied to the soil for all crops but is most effective in acidic soils, particularly for topdressing of winter crops in the spring.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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Both urea and calcium nitrate were feed-grade fertilizers obtained from Introlab Chemicals (Pty.) Ltd., Pretoria, South Africa.
Calcium nitrate significantly reduced (P < 0.05) blackleg incidence by more than 20% in experiments 1 and 2 at 14 Weeks After Crop Emergence (WACE).
The production fertilizations along the experiment used, in the first and second cycles, the following fertigations: first application (post-thinning)--7 g [plant.sup.-1] of zinc sulfate, 60 g [plant.sup.-1] of manganese sulfate, 500 g [plant.sup.-1] of magnesium sulfate, 500 g [plant.sup.-1] of calcium nitrate; second application (flowering)--100 g [plant.sup.-1] of zinc sulfate, 60 g [plant.sup.-1] of boric acid, 600 g [plant.sup.-1] of calcium nitrate.
In modern calcium nitrate manufacturing various types of calcium processed with aqueous solutions of nitric acid suspended in the reaction system.
In case of sample Y, calcium nitrate and ammonium dihydrogen phosphate were used as calcium and phosphate precursors respectively.
Boman [7] early proved that total acidity amount was higher in control than the calcium nitrate treatment for Valencia orange, which corresponded with the results of this study.
The surface morphologies of CaO-Ti[O.sub.2] nanotubes synthesized in 0.6M calcium nitrate solution for 24, 48, and 72 hours were subsequently observed via FESEM as presented in Figures 1(a) to 1(c), respectively.
It has been already reported that [beta]-CaSi[O.sub.3] is synthesized by heat treatment of gel-derived materials at 1000[degrees]C using TEOS and hydrated calcium nitrate as starting materials in a solvent of diluted nitric acid or sodium hydroxide solution [18], which agrees with the results of the present work.
To accelerate their decomposition, season their piles with calcium nitrate granular fertilizer or dried blood.
The company has also recently invested in a new plant that produces calcium nitrate solution for odour control applications.