Potassium Nitrate For Fertilizer 7757-79-1 KNO₃

Potassium Nitrate (chemical formula: KNO₃, CAS 7757-79-1) is a colorless transparent crystal or white powder with a slightly salty and cool taste. It is highly soluble in water, low in hygroscopicity (not easy to clump), and chemically stable at room temperature. As a widely used industrial and agricultural chemical, it is strictly supplied for legitimate civil applications in line with global hazardous chemical management regulations.
Core Product Grades & Technical Specifications
1. Agricultural Grade Potassium Nitrate
•Key Indicators: Purity ≥99.0%, nitrogen content 13.5%-13.8%, potassium content 46.2%-46.5%, chloride ≤0.02%, moisture ≤1.0%
•Core Features: A physiologically neutral fertilizer with excellent water solubility (31.6g/100mL at 20℃). No nutrient residues; suitable for drip irrigation, sprinkler irrigation and other precision fertilization scenarios, and does not acidify soil with long-term use.
2. Industrial Grade Potassium Nitrate
•Key Indicators: Purity Grade Ⅰ ≥99.8%, Grade Ⅱ ≥99.4%; water-insoluble substances ≤0.03%, chloride ≤0.01%, pH (10% solution) 6.0-8.0
•Core Features: Controlled oxidizing properties, uniform particle size (0.85-2.0mm accounts for ≥90%), suitable for automatic production line feeding, and excellent stability at high temperatures.
3. Food & Pharmaceutical Grade Potassium Nitrate
•Key Indicators: Purity ≥99.5%, arsenic (As) ≤0.0002%, lead (Pb) ≤0.0005%, loss on drying ≤0.5%
•Core Features: Complies with GB 2760-2024 (China Food Additive Standard) and international food safety norms. Pharmaceutical grade can be directly used in pharmaceutical preparation, with no peculiar smell and no sensitization.
Legitimate Application Scenarios
1. Agriculture: High-Efficiency Fertilizer
As a chlorine-free nitrogen-potassium compound fertilizer, it is suitable for over 80 chlorine-sensitive crops such as fruits (strawberries, blueberries), vegetables (tomatoes, cucumbers) and tobacco. It promotes fruit enlargement and sugar accumulation—increasing strawberry sweetness by 8%-12% and tomato yield by over 15%. It is a preferred fertilizer for protected agriculture.
2. Industrial Manufacturing: Basic Auxiliary
•Glass & Ceramics: Acts as a clarifier to reduce melting temperature by 30-50℃, reduce bubble impurities, and increase the light transmittance of optical glass to over 92%, applicable to the production of automobile lamp shells and display tube shells.
•metal Processing: Used to prepare high-temperature salt bath (400-550℃) for quenching bearings and gears, improving workpiece hardness by 20%-30% and wear resistance by 50%.
•New Energy: Raw material for lithium battery cathode precursor; with the global energy storage battery capacity doubling by 2025, its demand in this field will grow by over 15%.
3. Food & Pharmaceutical Industries: Functional Additive
•Food Processing: Added at 0.3-0.5g/kg in ham and bacon to inhibit Clostridium botulinum growth, extend shelf life by 60-90 days, and maintain the bright red color of meat products.
•Pharmaceuticals: Used in the production of penicillin potassium salt and rifampicin; oral preparations help dilate blood vessels (adjuvant for hypertension), and external use relieves oral ulcer pain.
Compliance & Supply Requirements
•Regulatory Adherence: Fully complies with China Hazardous Chemicals Safety Management Regulations and international norms (e.g., EU REACH). only supplied to enterprises with valid hazardous chemical operation qualifications.
•Buyer Eligibility: Buyers must provide business license (with relevant business scope) and end-use statement (detailing civil application scenarios); export requires valid customs clearance documents and end-user certificate.
•Disclaimer: Not for military, explosive or prohibited uses. The supplier reserves the right to verify buyer qualifications and reject non-compliant orders.
Safety & Storage Guidelines
•Store in a cool, dry area (temperature ≤30℃, humidity ≤75%), away from organic substances, reducing agents, sulfur and charcoal.
•Transport via dedicated hazardous chemical vehicles; avoid impact and exposure to sunlight. In case of leakage, cover with sand for collection—do not rinse directly with water.