What is Calcium Nitrate Tetrahydrate?
Calcium nitrate, also called Norgessalpeter (Norwegian saltpeter) is the inorganic compound with the formula Ca(NO3)2 4H20. This colourless to white monoclinic crystal absorbs moisture from the air and is commonly found as a tetrahydrate. Calcium nitrate is manufactured by neutralising nitric acid with calcium carbonate. It is mainly used as a component in fertilizers.
Properties of calcium nitrate:
- Synonyms: calcium nitrate, calcium dinitrate; nitrate de calcium; nitrato de calcio; Calciumnitrat; nitric acid calcium salt; Calcium nitrate hydrate (1:2:4);
- CAS Number : 13477–34–4
- EINECS : 233–332–1
- Molecular formula: Ca(NO3)2 4H20
- Molar mass: 236.15
- Appearance: colourless to white solid
- Density: 1.89
- Melting point: 42.7 oC
- Boiling point: 132 oC
- Solubility in water: 129 g/100 mL (20 oC)
- Solubility: dissolves in alcohol and acetone
- pH Value: 5–7
Calcium nitrate easily dissolve in water , methyl alcohol and ethanol.
Uses For Calcium Nitrate
- Commonly used in fertilizer See below for more information
- Used as a plant food
- Corrosion inhibitor in diesel fuel
- Used in manufacture of matches & fireworks
Calcium nitrate is mainly used as coagulant in rubber latex manufacture and asa refrigerant. It is also used in oil exploratory well and sewage treatment. In agriculture it is used as soiless culture and fast-effective fertilizer for acid soil. It also can be used to make fireworks and incandescent lamp chimney in light industry, to produce explosives in national defense industry and to paint negative pole in electron instrument industry. It is also a raw material in making other nitrates.
Calcium Nitrate as a fertiliser
calcium nitrate is used as a fertiliser as it increases yield and quality of fruit and crops, it builds up resistance to disease and pests, it extends the storage life of fruits, it permits rapid absorption of calcium and nitrate by plants, it does not burn and it doesn’t create alkaline or salt conditions. Calcium nitrate provides 15.5% nitrogen and 26.3% calcium which can be rapidly absorbed by plants.
The use of Calcium Nitrate in saline soils, maintains high calcium levels which will reduce the plants uptake of sodium resulting in improved plant growth. Improved soil structure: The calcium in Calcium Nitrate displaces sodium in the soil profile, which improves soil structure increasing water and oxygen infiltration in sodic soils.
Improved disease tolerance: Calcium strengthens the plants cells and improves disease tolerance. Low calcium cells are weak with lower resistance to disease invasion and a tendency to leak nutrient from the cell provides a ready source of food source for disease to develop. Examples of this include: Botrytis in roses, lettuces, stone fruit and clubroot in brassicas.
Applications of calcium nitrate also improve the storage quality of crops reducing bitter pit in apples, bulb rot in onions and Erwinia soft rot in potatoes; it permits longer shelf life of table grapes, stone fruit and fresh flowers. Other benefits of feeding with calcium nitrate include improved skin and peel appearance with reduced blemishes and improved stress tolerence.
Ground application: 125 to 250 kg/ha. Up to 3 applications per season depending on crop.
Foliar application: 500 to 800 grams per 100 litres. Up to 10 applications per season depending on crop.
Hydroponic solutions: Run at 1 gram per litre of water flowing through the system.
Health & safety
R-phrases: R8 Contact with combustible material may cause fire.
For full details see MSDS for calcium nitrate tetrahydrate