Potassium Nitrate BP
Potassium nitrate is a chemical compound with the chemical formula KNO3. It is an ionic salt of potassium ions K+ and nitrate ions NO3− and is therefore an alkali metal nitrate. Potassium nitrate is one of several nitrogen-containing compounds collectively referred to as saltpeter or saltpetre.
The most famous use of potassium nitrate is probably as the oxidizer in blackpowder. It is used in meat processing. Widely used as a thickening agent in soups and stews. Used in some toothpastes for sensitive teeth.
Chemical Name: Potassium Nitrate
Mol. Formula: KNO3
Mol. Weight: 101.1 g/mol
CAS no.: 7757-79-1
|Characters||It appears as a white, crystalline powder or colorless crystals|
(a)It gives the reaction of nitrates
(b)It gives the reaction of potassium
|Solubility||Freely soluble in water, very soluble in boiling water, practically insoluble in ethanol (96%)|
|Appearance of solution||The solution is clear and colorless|
|Acidity or alkalinity||Specified test|
|Reducible substances||Specified Test. The solution does not become blue within 2 min|
|Chlorides||Not more than 20 ppm|
|Sulfates||Not more than 150 ppm|
|Ammonium||Not more than 100 ppm|
|Calcium||Not more than 100 ppm|
|Iron||Not more than 20 ppm|
|Sodium||Not more than 0.1%|
|Heavy metals||Not more than 10 ppm|
|Loss on drying||Not more than 0.5%|
|Assay||Not less than 99.0% and not more than 101.0% (dried substance)|
Shelf life, Storage and Packing
It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.
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