Potassium Nitrate Basic Information
Product Name: Potassium nitrate
Synonyms: POTASSIUM NITRATE FINE XTL; nitre;v icknite;SALTPETER;POTASSIUM ION CHROMATOGRAPHY STANDARD;POTASSIUM NITRATE PHOTOGRAPHIC GRADE;POTASSIUM NITRATE CELL CULTURE TESTED;POTASSIUM NITRATE R. G., REAG. ACS, REAG . ISO, REAG. PH. EUR.
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Mol File: 7757-79-1.mol
Potassium Nitrate Chemical Properties
Melting point: 334 °C(lit.)
Boiling point :100 °C750 mm Hg
Density: 1.00 g/mL at 20 °C
storage temp. :Store at RT.
Solubility: H2O: 1 M at 20 °C, clear, colorless
form : Solid
PH:5.0-7.5 (50g/l, H2O, 20℃)
Water Solubility:320 g/L (20 oC)
Stability: Stable. Strong oxidizer - contact with combustible material may cause fire. Incompatible with combustible materials, strong reducing agents.
CAS DataBase Reference:7757-79-1(CAS DataBase Reference)
EPA Substance Registry System:Nitric acid potassium salt(7757-79-1)
Risk Statements: 8-36/38-36/37/38-22
RIDADR:UN 3264 8/PG 3
HS Code:2834 21 00
Hazardous Substances Data:7757-79-1(Hazardous Substances Data)
Toxicity:LD50 orally in rabbits:1.166 g anion/kg, Dollahite, Rowe, Southwest. Vet. 27, 246 (1974)
Potassium Nitrate Usage And Synthesis
Description: Potassium nitrate (chemical formula: KNO3) is the nitrate of potassium. It is a crystalline salt and a strong oxidizer which can be specially used in making gunpowder, as a fertilizer, and in medicine. It can be manufactured through the reaction between ammonium nitrate and potassium hydroxide, and alternatively through the reaction between ammonium nitrate with potassium chloride. Potassium nitrate has various applications. Its major applications include: fertilizer, tree stump removal, rocket propellant and fireworks. It can also be used for the nitric acid production. It is also useful for food preservation and food preparation. In pharmacology, it can be used to treat asthma and relieving high blood pressure.
1.Potassium nitrate is used chiefly in the manufacture of gunpowder or other explosives, but is also used for fireworks, for lucifer matches, for curing meat, for manufacture of certain kinds of glass, for flux in metallurgical assays, for some dyeing, and in medicine.
2.In agriculture, potassium nitrate is used as a water-soluble and virtually chloride-free source of nitrate-nitrogen and potassium nutrients. Due to the product's specific characteristics and benefits, target markets are related to high-value crops such as vegetables, fruits and flowers. Furthermore, chloride-sensitive crops, such as potato, strawberry, beans, cabbage, lettuce, peanut, carrot, onion, blackberry tobacco, apricot, grapefruit and avocado, will depend for their quality on the use of chloride-free K sources, such as potassium nitrate.
3.Potassium nitrate is used in a wide variety of applications including glass manufacturing, explosives for mining and civil works, metal treatment, fireworks, and recently, as a means to drastically increase the efficiency of Concentrating Solar Power (CSP) plants as described in the following paragraph.
Potassium nitrate fertilizer:?? Potassium nitrate is a water-soluble NK fertilizer containing 13.7% nitrate nitrogen and 46% potassium oxide (38.4%). Potassium nitrate (KNO3) is a soluble source of two major essential plant nutrients. It’s commonly used as a fertilizer for high-value crops that benefit from nitrate (NO3-) nutrition and a source of potassium (K+) free of chloride (Cl-).
Manufacturers typically make potassium nitrate fertilizer (sometimes referred to as nitrate of potash or NOP by reacting potassium chloride (KCl) with a nitrate source. Depending on the objectives and available resources, the nitrate may come from sodium nitrate, nitric acid or ammonium nitrate. The resulting KNO3 is identical regardless of the manufacturing process. Potassium nitrate is commonly sold as a water-soluble, crystalline material primarily intended for dissolving and applying with water or in a prilled form for soil application. Traditionally, this compound is known as saltpeter.
Growers value fertilizing with KNO3 especially in conditions where a highly soluble, chloride-free nutrient source is needed. In such soils, all of the N is immediately available for plant uptake as nitrate, requiring no additional microbial action and soil transformation. Growers of high-value vegetable and orchard crops sometime prefer to use a nitrate-based source of nutrition in an effort to boost yield and quality. Potassium nitrate contains a relatively high proportion of K, with an N to K ratio of approximately one to three. Many crops have high K demands and can remove as much or more K than N at harvest. Applications of KNO3 to the soil are made before the growing season or as a supplement during the growing season. A diluted solution is sometimes sprayed on plant foliage to stimulate physiological processes or to overcome nutrient deficiencies. Foliar application of K during fruit development? advantages some crops, since this growth stage often coincides with high K demands during the time of declining root activity and nutrient uptake. It’s also commonly used for greenhouse plant production and hydroponic culture. Potassium nitrate accounts for only a small portion of the global K fertilizer market. It’s primarily used where its unique composition and properties can provide specific benefits to growers. Further, it’s easy to handle and apply, and is compatible with many other fertilizers, including specialty fertilizers for many high-value specialty crops, as well as those used on grain and fiber crops.