Other Names:
Saltpeter, Nitre, Nitrate of Potash, Nitric Acid Potassium Salt, Kaliumnitrat, Potash Nitrate, Vicknite, E252
Specification Summary
- Purity: 99.0–99.8% (Technical, Agricultural, and Food Grades)
- Form: White crystalline powder or granules
- CAS No.: 7757-79-1
- Molecular Formula: KNO₃
- Molecular Weight: 101.10 g/mol
Product Description
Potassium Nitrate is a white, odorless, crystalline solid with a sharp, salty-bitter taste. It is highly soluble in water (up to 383 g/L at 25°C), forming a nearly neutral solution (pH 6.2–7.0 for a 10% solution). The compound is non-hygroscopic under standard conditions, stable, and non-corrosive, but acts as a strong oxidizer and should be kept away from reducing agents and combustible materials. Potassium nitrate is non-flammable but will accelerate the burning of other materials due to its oxidizing nature.
Potassium Nitrate Specification Table
| Property | Specification / Value |
| Chemical Name | Potassium Nitrate |
| Other Names | Saltpeter, Nitre, Nitrate of Potash |
| CAS Number | 7757-79-1 |
| Molecular Formula | KNO₃ |
| Molecular Weight | 101.10 g/mol |
| Appearance | White crystalline powder/granules |
| Purity (KNO₃) | 99.0–99.8% |
| Density (20°C) | 2.11 g/cm³ |
| Melting Point | 334°C |
| Boiling Point (Decomposes) | 400°C |
| Solubility in Water (25°C) | 383 g/L |
| pH (10% solution) | 6.2–7.0 |
| Moisture Content | ≤0.10% |
| Chloride (as Cl⁻) | ≤0.01–0.02% |
| Insoluble Matter in Water | ≤0.05% |
| Sulfate (as SO₄²⁻) | ≤0.005% |
| Iron (Fe) | ≤0.003% |
| K₂O Content | ≥46.0% |
| Nitrogen (N) Content | 13–13.5% |
Downloadable TDS
A comprehensive Technical Data Sheet (TDS) is available, providing full chemical, physical, and safety specifications, as well as handling, storage, and regulatory compliance information.
Application Sectors and Industries of Potassium Nitrate
Fertilizer Industry
Potassium nitrate is a premium source of potassium and nitrate nitrogen for crops, supporting rapid plant growth, high yields, and improved fruit quality. It is widely used in fertigation, hydroponics, and specialty fertilizers for horticulture, greenhouse, and high-value crops.
Food Processing
Used as a food additive (E252), potassium nitrate acts as a preservative and color fixative in cured meats and cheeses. It inhibits bacterial growth and maintains the characteristic color and flavor of processed foods.
Explosives and Pyrotechnics
A key oxidizing agent in black powder, fireworks, and safety fuses, potassium nitrate enables controlled combustion and color effects in pyrotechnic displays and propellants.
Glass and Ceramics
Potassium nitrate serves as a refining and clarifying agent in glass manufacturing, improving clarity and removing air bubbles. It is also used in ceramic glazes and specialty glass products.
Metal Treatment and Heat Transfer
Used in heat treatment salts for steel and rubber manufacturing, potassium nitrate provides uniform heating and oxidation control. It is also a component in heat transfer and thermal energy storage salts.
Water Treatment
Applied as a nutrient source for denitrification in biological wastewater treatment, potassium nitrate supports the removal of nitrogen compounds and enhances water quality.
Pharmaceuticals
Potassium nitrate is used as a raw material in the synthesis of certain medications and as a mild diuretic. It is also found in some toothpaste formulations for sensitive teeth.
Chemical Manufacturing
Acts as a precursor for potassium nitrite and other specialty chemicals. It is used as an oxidizing agent in various chemical syntheses and laboratory processes.
Agriculture and Horticulture
Beyond fertilizers, potassium nitrate is used as a foliar spray and in fertigation systems to correct potassium and nitrogen deficiencies, improving crop resilience and productivity.
Electronics and Specialty Glass
High-purity potassium nitrate is used in the manufacture of electronic-grade glass, optical fibers, and display panels, where low impurity levels are critical for performance.
Packaging Types
- 25 kg Polyethylene or Paper Bags:
Moisture-resistant, sealed bags suitable for manual handling and small-scale industrial, agricultural, or food applications. - 50 kg Multi-Wall Paper Bags:
Heavy-duty, lined bags for bulk users in fertilizer, chemical, or glass industries. - 1,000 kg Jumbo Bags (FIBCs):
Flexible Intermediate Bulk Containers for efficient storage and transport in large-scale manufacturing or agricultural operations. - Bulk Tankers:
Used for direct delivery to major industrial customers, ensuring product integrity and minimizing contamination. - Food-Grade Packaging:
25 kg poly-lined bags with tamper-evident seals, compliant with food safety standards for E252 applications.
For detailed product specifications, safety data, and regulatory compliance, please download the Technical Data Sheet (TDS) or contact our technical support team.
