Potassium Nitrate KNO₃ CAS 7757-79-1
- CAS: 7757-79-1
- Synonyms: Saltpetre; Nitre; Nitrate of Potash
- EINECS: 231-818-8
- Molecular Formula: KNO₃
- Grade: 99% / 98% / 95% / Electronic
- Package: 25kg/bag or according to customer requirements
Description
Tree Chem manufactures high-purity Potassium Nitrate (CAS 7757-79-1) with advanced crystallization and refining technology to ensure precise composition and stable quality. As a professional factory, we produce KNO₃ in multiple physical forms—powder, prills, and granules—suitable for analytical, food, and industrial-grade use. Our product offers excellent solubility, fine particle uniformity, and low chloride levels, making it ideal for precision agriculture, energy storage systems, and specialty chemical synthesis.
Tree Chem maintains long-term cooperation with multiple international distributors to provide consistent global supply and technical support. For specification details, sample requests, or to order high-purity KNO₃ in bulk, please contact info@cntreechem.com.
Specification
Basic Information
| Item | Details |
| Product Name | Potassium Nitrate |
| CAS Number | 7757-79-1 |
| EINECS / EC No. | 231-818-8 |
| Synonyms | Saltpetre; Nitre; Nitrate of Potash |
| Molecular Formula | KNO₃ |
| Molecular Weight | 101.10 g/mol |
| Appearance | White crystalline powder / prills / granules |
| Grade | Industrial / Agricultural / Food-grade / Analytical / Electronic |
| KNO₃ Content | ≥99.0% (analytical), ≥98.0% / High Pure / Electronic optional |
| Packing | 25kg Kraft/PP Laminated Bags 25/50kg Fiber Drums 500/1000kg Jumbo FIBC Bags |
Technical Specification
| Parameter | High-Pure Grade | Top Grade | First Grade | Agricultural Grade |
| Purity (KNO₃) | ≥ 99.9% | ≥ 99.8% | ≥ 99.4% | ≥ 98.0% |
| Moisture | ≤ 0.10% | ≤ 0.10% | ≤ 0.10% | ≤ 0.10% |
| Chloride (Cl⁻) | ≤ 0.005% | ≤ 0.01% | ≤ 0.01% | ≤ 0.10% |
| Water Insoluble Matter | ≤ 0.005% | ≤ 0.01% | ≤ 0.01% | ≤ 0.10% |
| Sulfate (SO₄²⁻) | ≤ 0.003% | ≤ 0.005% | ≤ 0.005% | — |
| Moisture Absorption Rate | ≤ 0.20% | ≤ 0.25% | ≤ 0.30% | — |
| Iron (Fe) | ≤ 0.001% | ≤ 0.003% | ≤ 0.003% | — |
| Potassium Oxide (K₂O) | — | — | — | ≥ 46.0% |
| Nitrogen (N) | — | — | — | — |
We offer food grade, industrial grade, and high purity potassium nitrate for use in the electronics industry.
Applications
Potassium Nitrate (KNO₃) is widely used in glass manufacturing, ceramic industry, metal processing, and agrochemical industry.
Optical glass (high-purity): Optical glass-grade potassium nitrate can effectively adjust the refractive index of glass, inhibit crystallization, and increase the light transmittance of glass to over 92%. It is suitable for manufacturing high-end products such as camera lenses, laser windows, and optical fiber preforms.
Electronic glass manufacturing (high-purity): High-purity potassium nitrate plays a key role in the chemical tempering process for products such as mobile phone glass, tablet touchscreens, and smartwatches.
CRT and display manufacturing (electronic-grade potassium nitrate): Electronic-grade potassium nitrate is used to manufacture the phosphors that display images on cathode ray tube (CRT) screens, providing vibrant colors and high-resolution images. In CRT production, potassium nitrate is a key raw material for the tube glass envelope, ensuring its high strength and excellent optical properties.
Solar Photovoltaic (electronic Grade Potassium Nitrate): In the production of photovoltaic glass, high-purity potassium nitrate is used as a flux and clarifier, which can improve the transparency and mechanical strength of the glass. The potassium nitrate products produced by Xinjiang Saltpeter Company are pure natural, non-agglomerated, high in purity, and low in chloride ions and heavy metals. They are widely used in photovoltaic glass manufacturing and other fields.
Aerospace component heat treatment: High-purity potassium nitrate is used for quenching aircraft components, heat exchanger components, and high-speed tool steel.
Bearing Heat Treatment: A mixed salt of 50% potassium nitrate and 50% sodium nitrite is widely used, particularly for quenching GCr15 steel bearings.
Electroless Plating and Surface Treatment: Potassium nitrate is used as an oxidant and catalyst. In processes such as electroless nickel and copper plating, potassium nitrate provides the necessary oxidizing environment.
Traditional Ceramic Glazes: Potassium nitrate acts as a flux, lowering the melting temperature of the glaze and improving its gloss and transparency.
Fine and Specialty Ceramics: High-purity potassium nitrate not only acts as a flux but also participates in the formation of the ceramic material’s crystal structure, significantly impacting its performance.
Agriculture: Production of high-end compound fertilizers, water-soluble fertilizers, and fertilizers for specialty crops, as well as its application in organic farming.
Storage & Handling
- Store in a cool, dry, and well-ventilated area, away from heat sources, flammable materials, and reducing agents.
- Keep containers tightly sealed and moisture-proof.
- Use corrosion-resistant packaging and storage equipment.
- Maintain good ventilation during handling to prevent dust accumulation.
- Follow local oxidizer storage and transport regulations (UN 1486).
Usage Notice
- Oxidizing properties: Avoid contact with organic materials, reducing agents, or metal powders.
- Use proper personal protective equipment (PPE) such as gloves, goggles, and dust masks.
- Prevent dust inhalation and eye contact; rinse immediately with water in case of exposure.
- Dispose of waste according to local environmental regulations and hazardous-substance guidelines.
Packaging
- 25 kg kraft / PP laminated bags with inner PE liner
- 25 kg / 50 kg fiber drums (optional inner liner)
- 500 kg / 1000 kg jumbo FIBC bags for bulk export
- Small and food-grade packages available on request
