HuaRong Brand Potassium Dihydrogen Phosphate (Superior Grade)
I. Product Definition and Core Standards
This product is the superior grade of "HuaRong" brand potassium dihydrogen phosphate (chemical formula: KH₂PO₄). As the highest-grade product, all its indicators are superior to those specified for premium products in the national standard GB/T 2321-2016 "Fertilizer-Grade Potassium Dihydrogen Phosphate."
Its core characteristics are high purity, full water solubility, chlorine-free, and rich in phosphorus and potassium nutrients. It is a multi-purpose product with both efficient fertilizer efficiency and fine chemical quality.
II. Key Physicochemical Indicators and Specifications
Main nutrient content: Ensures phosphorus pentoxide (P₂O₅) content ≥ 52.0%, potassium oxide (K₂O) content ≥ 34.0%, and total nutrients ≥ 86%. Some high-end models have nutrient contents close to theoretical values (P₂O₅ about 52.2%, K₂O about 34.6%).Purity and impurity control: The product purity (KH₂PO₄ content) is usually ≥ 99.0%.
Strictly control key impurities: chloride ion (Cl⁻) content ≤ 0.2%, extremely low sodium ion (Na⁺) content, and heavy metal (calculated as Pb) and arsenic (As) contents far below national standard limits. Water-insoluble matter content ≤ 0.1%.Physical properties: Appears as white crystals or powder with good fluidity. The pH value of a 1% aqueous solution is stable at 4.4-4.7, showing weak acidity.
III. Production Process and Technical Support
This product is usually produced by the neutralization and crystallization process of thermal phosphoric acid and high-purity potassium hydroxide. This process ensures the ultra-high purity of raw materials and finished products, avoiding fluorine, chlorine, sulfate radicals, and various metal impurities brought by wet phosphoric acid from the source. It guarantees the clarity and chemical stability of the product solution, meeting the high-end application needs sensitive to impurities.
IV. Main Application Fields
High-end agriculture and precision fertilization:
Efficient foliar spraying: Due to its high purity, low impurity content, and fast absorption, it is the preferred product for foliar topdressing during the key periods of flowering and fruit setting, fruit expansion, color change, and stress resistance. It can significantly promote photosynthesis, retain flowers and fruits, improve quality, and enhance cold and drought resistance.
Core raw material for water and fertilizer integration: The characteristics of full water solubility, no residues, and low conductivity make it the standard phosphorus-potassium source for formulating high-end water-soluble fertilizers for drip irrigation and sprinkler irrigation, which can be safely used for all crops.
Seed treatment and growth regulation: Used for seed soaking and dressing, it can improve germination rate and cultivate strong seedlings.
Industrial and special uses:
Buffering agent and culture medium: Widely used in bioengineering, cell culture, microbial fermentation, and analytical chemistry as a pH buffering agent and nutrient component.
Food industry additive: Food-grade products can be used as quality improvers, chelating agents, and nutritional supplements.
New energy material precursor: High-purity products are one of the important raw materials for the preparation of lithium iron phosphate cathode materials.
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