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Crystal Potassium Nitrate KNO3 For Fireworks Glass Industry

Crystal Potassium Nitrate KNO3 For Fireworks Glass Industry

Crystal Potassium Nitrate KNO3

Fireworks Potassium Nitrate KNO3

Glass Industry Potassium Nitrate Powder

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Product Details
Melting Point:
334 °C
Boiling Point:
100 °C750 Mm Hg
Storage Temp.:
Store At RT.
Crystal Powder Or White Granule
5.0-7.5 (50g/l, H2O, 20℃)
Water Solubility:
320 G/L (20 ºC)
Product Description

Potassium Nitrate KNO3 for Fireworks, White Crystal Potassium Nitrate for Glass Industry

Product Introduction

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.


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.


Potassium nitrate is a strong oxidant. Contact with organic matter can cause combustion and explosion. Therefore, potassium nitrate should be stored in a cool and dry place away from fire and heat source. It is forbidden to store and transport together with reducing agent, acid, combustible material and metal powder.



Product Specifications

Potassium Nitrate Specifications


No. Paramets Results
1 KNO3 ≥99.4%
2 K2O ≥46.4%
3 Nitrogen ≥14.13%
4 SO4 ≤0.005%
5 Moisture ≤0.2%
6 Water Insoluble ≤0.01%


Health Hazard

inhalation of this product dust is irritating to the respiratory tract, and inhalation of high concentration can cause pulmonary edema. Large amount of contact can cause methemoglobinemia, affect blood oxygen carrying capacity, and cause headache, dizziness, cyanosis, nausea and vomiting. Severe cases may cause respiratory disorder, collapse, or even death. Oral administration may cause severe abdominal pain, vomiting, bloody stool, shock, generalized convulsions, coma, and even death. It is strongly irritating to skin and eyes, even causing burns. Repeated skin contact may cause skin dryness, chaps and rashes

Product Application

1. Agricultural Uses

Potassium nitrate (KNO3) is a potassium salt of nitric acid, also known as saltpeter or nitrate of potash. It is a white crystalline salt which occurs naturally in nitre or saltpeter. It can be used as fertilizer for normal application and fertigation. Potassium (44% K2O) and nitrogen (13 %) are the constituents of NK fertilizers, which serve as a source of potassium, where extra chloride is not desired.
The agricultural grade of potassium nitrate is freeflowing and non-caking, with a particle size in the range of 1500 to 400 microns.
Potassium nitrate, which is slightly hygroscopic and granulated, can be spread on soil by trucks, fertilizer distributors or by aerial spraying. In a mixed fertilizer, a powdered grade of nitrate of potash does not cake. Potassium nitrate is made by the reaction of potassium chloride with nitric acid as: The nitrate of potash forms an easily breakable crust on top. It is chemically neutral and its nitrogen and potassium oxide ratio is roughly 1:3. It has been used successfully as a source of nitrogen and potassium for tobacco, tomato, potato, corn, citrus and carnations.

2. Industrial uses

Potassium nitrate is also called niter and saltpeter,although these usually refer to the nativemineral. A substance of the composition KNO3,it is used in explosives, for bluing steel, and infertilizers. A mixture of potassium nitrate andsodium nitrate is used for steel-tempering baths.The mixture melts at 250°C. Potassium nitrateis made by the action of potassium chloride onsodium nitrate. It occurs in colorless prismaticcrystals, or as a crystalline white powder. It hasa sharp saline taste and is soluble in water. Thespecific gravity is 2.1 and the melting point is337°C.
Potassium nitrate contains a large percentageof oxygen, which is readily given up andis well adapted for pyrotechnic compounds. Itgives a beautiful violet flame in burning. It isused in flares and in signal rockets.
Most enamels contain some oxidizing agentin the form of potassium or sodium nitrate.Only a small amount of nitrate is necessary; 2to 4% is sufficient to maintain oxidizing conditionsin most smelting operations.
In glazes it is sometimes used as a flux inplace of potassium oxide, but, owing to its costand solubility, very little of it is contained inglaze. Where conditions prevent the use of sufficientpotash feldspar, potassium oxide is introducedinto the mix, usually in the form of thenitrate in a frit.
Potassium nitrite is a solid of the compositionKNO2 used as a rust inhibitor, for theregeneration of heat-transfer salts, and for themanufacture of dyes.


3. Photoelectric grade potassium nitrate is mainly used for chemical strengthening of high-end glass. The viscosity of potassium glass is greater than that of sodium glass, which can reduce the crystallization tendency of glass and increase the transparency and gloss of glass. Potassium nitrate can be used as a good hardening material for tempered glass to enhance hardness and increase the ability to resist falling.

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Contact: Bella Cheng


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