Potassium Nitrate
 Potassium Nitrate is a white crystalline salt commonly known as saltpeter. It is a key oxidizing agent widely used in fertilizers, food preservation, pyrotechnics, and chemical manufacturing. Potassium Nitrate provides essential potassium and nitrogen nutrients in agriculture and acts as a source of oxygen in combustion reactions. Its stability and solubility make it valuable across various industries from agriculture to explosives.
Primary Uses
Agriculture
- Used extensively as a high-quality fertilizer supplying potassium and nitrogen essential for plant growth.
- Applied in hydroponics and soil conditioning to enhance crop yield and quality.
Food Preservation
- Employed as a curing agent in processed meats to inhibit microbial growth and preserve color.
- Acts as a preservative and antioxidant in food products.
Pyrotechnics and Explosives
- Serves as an oxidizer in fireworks, explosives, and rocket propellants.
- Used in manufacturing gunpowder and other pyrotechnic devices.
Chemical Industry
- Utilized as a raw material in producing nitric acid and other potassium compounds.
- Acts as an oxidizing agent in various chemical syntheses.
Secondary UsesÂ
Glass and Ceramics
- Used as a flux in glassmaking to improve clarity and melting properties.
Pharmaceuticals
- Used in small quantities in pharmaceutical formulations and diagnostic agents.
Water Treatment
- Occasionally used in water treatment processes as an oxidizing agent.
Metallurgy
- Applied in metal heat treatment processes and metal polishing compounds.
 Basic Identification Attributes
- Chemical Name (IUPAC): Potassium nitrate
- Common/Trade Name: Potassium Nitrate
- CAS Number: 7757-79-1
- HS Code: 2834.29
- Synonyms: Saltpeter; Nitrate of potash
Physical & Chemical Properties
- Physical State: White crystalline solid or powder
- Color & Odor: White; odorless
- Solubility: Highly soluble in water (~31.6 g/100 mL at 20°C)
- Melting Point: 334°C
- Density: 2.11 g/cm³
- Stability: Stable under normal conditions; decomposes on heating above 400°C
Safety & Hazard Attributes
- GHS Classification: Oxidizing solid (Category 2); may intensify fire
- Toxicity: Low to moderate toxicity; avoid ingestion and inhalation
- Exposure Limits: Follow occupational safety limits; use protective equipment
Storage & Handling Attributes
- Storage Conditions: Store in a cool, dry, well-ventilated area away from combustible materials
- Container Type: Plastic or metal containers with tight seals
- Shelf Life: Generally 2–5 years if stored properly
- Handling Precautions: Avoid contamination with organic materials; use PPE to prevent dust inhalation
Regulatory & Compliance Attributes
- Complies with fertilizer, food additive, and chemical safety regulations worldwide
- Classified as hazardous for transport due to oxidizing properties
Environmental & Health Impact
- Biodegradability: Inorganic salt; does not biodegrade but is environmentally stable
- Ecotoxicity: Can be harmful to aquatic life in high concentrations due to nitrate pollution
- Bioaccumulation: Not significant
Safety Handling Precautions
- PPE Required: Gloves, safety goggles, dust mask or respirator recommended
- Handling Guidelines: Avoid dust formation and contact with combustible materials
- Storage Measures: Keep containers tightly closed and away from heat and ignition sources
First Aid Measures
- Inhalation: Move to fresh air; seek medical attention if respiratory symptoms occur
- Skin Contact: Wash with soap and water; seek medical advice if irritation persists
- Eye Contact: Rinse eyes with water for at least 15 minutes; seek medical attention if irritation continues
- Ingestion: Rinse mouth; seek medical advice immediately
Firefighting Measures
- Fire Hazards: Strong oxidizer; may intensify fires and cause explosions when in contact with flammable materials
- Extinguishing Media: Use water spray, foam, or dry chemical extinguishers; avoid dry powder extinguishers alone
- Special Precautions: Firefighters must wear protective clothing and self-contained breathing apparatus
Hazardous Combustion Products: Nitrogen oxides and potassium oxides