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Calcium Nitrate
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Last Updated
11 Jan 2021
Minimum Order
1 Kilogram
Category
Chemicals

Specification of Calcium Nitrate

Calcium nitrate, also known as Norgessalpeter (Norwegian saltpeter), is an inorganic compound with the chemical formula Ca (NO3) 2. This colorless salt absorbs moisture from the air and is commonly found as a tetrahydrate.

Uses:

1. Agriculture

The fertilizer grade of this compound (15.5-0-0 + 19% Ca) is widely used in greenhouses and hydroponic businesses; contains ammonium nitrate and water, as a "double salt" {\ displaystyle {\ ce {5Ca (NO3) 2.NH4NO3.10H2O}}} {\ displaystyle {\ ce {5Ca (NO3) 2.NH4NO3.10H2O}}}. Calcium nitrate is also used to control certain plant diseases. For example, a dilute calcium nitrate (and calcium chloride) spray is used to control the formation of holes and blockages in apple trees.

2. Wastewater treatment, Calcium nitrate is used in wastewater pre-conditioning for odor emission prevention. Wastewater pre-conditioning is based on establishing anoxic biology in the wastewater system. In the presence of nitrates, metabolism for sulfates comes to a halt, thus preventing the formation of hydrogen sulfide. Apart from that, biodegradable organic material is consumed, which otherwise could lead to anaerobic conditions in the downstream as well as the emission of the odor itself. This concept also applies to excess sludge treatment.

3. Concrete

Calcium nitrate is used in accelerated concrete mixing sets. The use of this compound in concrete and mortar is based on two effects. Calcium ions accelerate the formation of calcium hydroxide and thereby result in precipitation and regulation. This effect is used also in cold weather resistant concrete agents as well as some combined plasticizers. Nitrate ion leads to the formation of iron hydroxide, which is able to reduce corrosion of reinforcing concrete through its protective coating.

4. Latex coagulant


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