Calcium Nitrate
| S.No. | Item | Unit | Specifications | Result |
| 1 | Appearance | - | White crystalline powder | Complies |
| 2 | Purity Ca₂(NO₃)₂.4H₂O | % | 99.00 min | 99.52% w/w |
| 3 | Calcium (as Ca) | % | 16.80 min | 16.83% w/w |
| 4 | Nitrogen (as N) | % | 11.7 min | 11.81% w/w |
| 5 | Matter insoluble in water | % | 0.03 max | 0.01% w/w |
| 6 | Iron Content (as Fe) | ppm | 4 max | 3 ppm |
| 7 | Heavy Metals | ppm | 4 max | NIL |
| 8 | pH 5% aqueous soln. | - | 5-7 | 6.34 |
| S.No. | Parameter | Specification |
| 1 | Assay | 99.50% min. |
| 2 | Assay Calcium Nitrate (Ca(NO₃)₂) | 69.00% min. |
| 3 | Calcium (as Ca) | 16.80% min. |
| 4 | Nitrogen (as N) | 11.70% min. |
| 5 | Water-Insoluble Matter | 0.01% max |
| 6 | Chloride (as Cl) | 20 ppm max |
| 7 | Sulphates (as SO₄) | 10 ppm max |
| 8 | Iron (as Fe) | 4 ppm max |
| 9 | Heavy metals (Pb, Cd, As) | 4 ppm max |
| 10 | pH of 5% aq. soln. | 5–7 |
| 12 | Particle Size | 0.12 mm – 2.25 mm |
| 13 | Particle Size Distribution | |
| d(0.1) | 233.9 μm | |
| d(0.5) | 670.8 μm | |
| d(0.9) | 1148.0 μm | |
CALCIUM NITRATE
Calcium Nitrate Ca(NO3)2 is an inorganic salt and is hygroscopic due to moisture absorbing property. It is a common ingredient of fertilizers to prevent calcium deficiency of crops and has several applications in daily life. It is also called Norwegian saltpetre. It has its poisonous effects; intake of an excess amount may prove fatal. It is a nitrate salt of calcium. It is usually produced in granulated form. It is a hygroscopic solid as reacts with moist air.
Uses of Calcium Nitrate
- It is a good fertilizer frequently used in agriculture.
- It is an oxidizing agent thus used in match manufacturing.
- It serves in making other nitrate compounds.
- It is used in explosive-making procedures.
- It is used in wastewater treatment.
- To make the molten salt mixture, it is considered an essential part.
- It is used as a laboratory chemical while the formulation of other inorganic nitrate salts.
Preparation
It is formed when limestone is added to nitric acid. The resultant then, neutralizes to ammonia. It is now a day, produced as by-product of nitro phosphate manufacture.
Chemical Properties
It, a compound with the formula Ca(NO3)2, exhibits several chemical properties. Firstly, it is highly soluble in water, forming a colorless solution. This solubility makes it useful as a source of calcium and nitrogen in fertilizers. Secondly, when heated, it undergoes thermal decomposition to produce calcium oxide, nitrogen dioxide, and oxygen gas. This property makes it valuable in pyrotechnics and as a component in certain explosives. Additionally, calcium nitrate is a strong oxidizing agent, capable of promoting combustion reactions. Its oxidizing nature makes it useful in some industrial processes and as a component in rocket propellants. However, this property also necessitates careful handling to avoid hazards. Overall, the chemical properties of calcium nitrate make it versatile in various applications, ranging from agriculture to industrial processes, but require caution due to its reactivity.
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