Potassium Nitrate is a powerful oxidizing agent (releases oxygen on heating) and is used in gunpowder and fertilizers.
Potassium Nitrate is used in the manufacture of various types of Glass, Explosive-Blasting powder, Slurry, Dynamics, Matches, Fertilizers, Heat Treatment & Heat transfer salts and Leather processing Industries. Major uses of potassium nitrate are in fertilizers, rocket propellants and fireworks. It is one of the constituents of gunpowder. When used as a food additive in the European Union, the compound is referred to as E252.
Particulars --------- TECHNICAL GRADE --- PURE GRADE
Appearance ---------- White crystalline - White crystalline powder
Assay (as KNO3) ----- 99.000 % min ------ 99.50 % min
K 2 O --------------- 46.250 % min ------ 46.500 % min
Nitrogen ------------ 13.700 % max ----- 13.800 % min
Sulphate (as SO 4 ) - 0.010 % max ------- 0.005 % max
Chloride (as Cl) ---- 0.05 % max -------- 0.005 % max
Iron (as Fe) -------- 0.002 % max ------- 0.001 % max
Heavy Metal (as Pb) - 0.0003 % max ------ 0.0002 % max
Packing:
Potassium Nitrate is packed 50kg in HDPE laminated bags or as required by the buyer.
Uses:
Potassium is used in the manufacture of various types of Glass, Explosive-Blasting powder. Slurry, Dynamics, Matches, Fertilizers, Heat Treatment & Heat transfer salts and Leather processing Industries. Potassium nitrate is also one of the three components of black powder, along with powdered charcoal (substantially carbon) and sulfur, where it acts as an oxidizer. Potassium nitrate is an efficient oxidizer, which produces a lilac-colored flame upon burning due to the presence of potassium. It is therefore used in amateur rocket propellants and in several fireworks such as smoke bombs, made with a mixture of sucrose and potassium nitrate. It is also added to pre-rolled cigarettes to maintain an even burn of the tobacco. Potassium nitrate was used to ensure complete combustion of paper cartridges for cap and ball revolvers, as a treatment agent for the paper used to make the cartridges.
In the process of food preservation, potassium nitrate has been a common ingredient of salted meat since the Middle Ages.
Potassium nitrate is the main component (usually about 98%) of tree stump remover, as it accelerates the natural decomposition of the stump. It is also commonly used in the heat treatment of metals as a solvent in the post-wash. The oxidizing, water solubility and low cost make it an ideal short-term rust inhibitor.
Potassium nitrate can be found in some toothpastes for sensitive teeth. It successfully combats high blood pressure and was once used as a hypotensive.
KNO3 -- 101.1 -- 7757-79-1
DEFINITION
Potassium nitrate contains not less than 99.0 per cent and not more than the equivalent of 101.0 per cent of KNO3, calculated with reference to the dried substance.
CHARACTERS
A white, crystalline powder or colourless crystals, freely soluble in water, very soluble in boiling water, practically insoluble in alcohol.
IDENTIFICATION
A. It gives the reaction of nitrates.
B. Solution S (see Tests) gives the reactions of potassium.
TESTS
Solution S
Dissolve 10.0 g in carbon dioxide-free water prepared from distilled water and dilute to 100 ml with the same solvent.
Appearance of solution
Solution S is clear and colourless.
Acidity or alkalinity
To 10 ml of solution S add 0.05 ml of bromothymol blue solution. Not more than 0.5 ml of 0.01 M hydrochloric acid or 0.01 M sodium hydroxide is required to change the colour of the indicator.
Reducible substances
To 10 ml of solution S, add 0.5 ml of dilute sulphuric acid and 2 ml of zinc iodide and starch solution. The solution does not become blue within 2 min.
Chlorides
If intended for ophthalmic use, it complies with the test for chlorides. Dissolve 2.5 g in water and dilute to 15 ml with the same solvent. The solution complies with the limit test for chlorides (20 ppm).
Sulphates
Dilute 10 ml of solution S to 15 ml with distilled water. The solution complies with the limit test for sulphates (150 ppm).
Ammonium
1 ml of solution S complies with the limit test (A) for ammonium (100 ppm). If intended for ophthalmic use, not more than 50 ppm of ammonium.
Calcium
Dilute 10 ml of solution S to 15 ml with distilled water. The solution complies with the limit test for calcium (100 ppm). If intended for ophthalmic use, not more than 50 ppm of calcium.
Iron
Dilute 5 ml of solution S to 10 ml with water. The solution complies with the limit test for iron (20 ppm). If intended for ophthalmic use, not more than 10 ppm of iron.
Sodium
Not more than 0.1 per cent of Na, determined by atomic emission spectrometry.
Heavy metals
12 ml of solution S complies with limit test A for heavy metals (10 ppm).
Loss on drying
Not more than 0.5 per cent determined on 1.000 g by drying in an oven at 100°C to 105°C.
Potassium Nitrate
KNO3 101.10
Potassium nitrate.
Potassium nitrate [7757-79-1].
Potassium Nitrate contains not less than 99.0 percent and not more than 100.5 percent of KNO3.
Identification— A solution of it responds to the tests for Potassium and for Nitrate.
Chloride— A 500-mg portion of it shows no more chloride than corresponds to 0.21 mL of 0.020 N hydrochloric acid (0.03%).
Sulfate— Dissolve 100 mg of Potassium Nitrate in 10 mL of water, add 15 mL of 6 N hydrochloric acid, and evaporate to dryness on a steam bath. To the residue so obtained add 7 mL of 6 N hydrochloric acid, and evaporate to dryness on a steam bath. Dissolve the residue so obtained in about 35 mL of water and, if necessary, neutralize with hydrochloric acid using litmus paper indicator. Filter, if necessary, to obtain a clear test solution. This test solution shows no more sulfate than corresponds to 0.10 mL of 0.020 N sulfuric acid (0.1%).
Arsenic: 3 ppm.
Lead— A solution of 0.5 g of it in 20 mL of water contains not more than 5 4g of lead (corresponding to not more than 0.001% of Pb).
Heavy metals: 0.002%.
Iron: not more than 0.001%.
Limit of sodium— the limit is 0.1%.
Limit of nitrite— To pass the test.
KNO3 Formula wt 101.10
INS: 252 CAS: [7757-79-1]
DESCRIPTION
Potassium Nitrate occurs as colorless, transparent prisms, as white granules, or as a white, crystalline powder. It is slightly hygroscopic in moist air. One gram dissolves in 3 mL of water at 25°, in 0.5 mL of boiling water, and in about 620 mL of alcohol. Its solutions are neutral to litmus.
Function: Antimicrobial agent; preservative.
REQUIREMENTS
Identification: A 1:10 aqueous solution gives positive tests for Potassium and Nitrate.
Assay: Not less than 99.0% and not more than 100.5% of KNO3 after drying.
Chlorate: Sprinkle about 100 mg of dry sample on 1 mL of sulfuric acid. The mixture does not turn yellow.
Lead: Not more than 4 mg/kg.
Loss on Drying: Not more than 1%.
KNO3
Formula Wt 101.10
CAS Number 7757-79-1
REQUIREMENTS
Assay: 99.0% KNO3
pH of a 5% solution: 4.5-8.5 at 25C
MAXIMUM ALLOWABLE
Insoluble matter ........... 0.005%
Chloride (Cl) ............... 0.002%
Iodate (IO3) ............... 5 ppm
Nitrite (NO2) .............. 0.001%
Phosphate (PO4) ........ 5 ppm
Sulfate (SO4) .............. 0.003%
Heavy metals (as Pb) ... 5 ppm
Iron (Fe) ..................... 3 ppm
Calcium (Ca) ............... 0.005%
Magnesium (Mg) ......... 0.002%
Sodium (Na) ............... 0.005%
CAS No.: 7758-09-0
Formula: KNO2
Appearance: White to Yellowish
Solubility (10% in Water): Clear and Bright
Chloride: 0.005% Max.
Sodium: 0.25%
Assay: 96% and also 98%
Packing: 25 Kg Drum
