Potassium Dihydrogen Phosphite (KH₂PO₃), commonly referred to as Potassium Phosphite, is a high-efficiency, water-soluble phosphorus–potassium compound designed especially for liquid fertilizer manufacturing. It offers not only rapid nutrient absorption but also systemic mobility within plants and a built-in defense stimulation effect, making it a powerful raw material for producing advanced and value-added liquid fertilizers.
Product Specifications
- Assay (%) ≥ 98.0
- Water Insoluble Matter (%) ≤ 0.3
- Chloride (%) ≤ 0.01
- Iron (mg/kg) ≤ 50
- Heavy Metals (mg/kg) ≤ 50
- Appearance: White crystalline powder
These specifications provide a reliable benchmark for liquid fertilizer producers who demand high purity, stability, and consistent performance.
Key Technical Advantages in Liquid Fertilizer Formulation
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Excellent Solubility and Compatibility
Potassium phosphite dissolves readily in water, enabling high-concentration stock solutions. Its chemical stability makes it compatible with major liquid fertilizer components, such as nitrogen sources, amino acids, micronutrients, and other functional ingredients, facilitating versatile formulations. -
Dual Nutrient Source (P + K)
By supplying both phosphorus (as phosphite) and potassium, KH₂PO₃ simplifies the fertilizer formula. Liquid fertilizer manufacturers can reduce the number of raw materials, streamline production, and lower costs while maintaining high nutrient efficiency. -
Systemic Mobility Within Plants
The phosphite ion is transported systemically through both xylem and phloem, delivering nutrients efficiently to growing tissues. This mobility ensures that both shoots and roots receive the benefit, improving overall nutrient use. -
Biostimulant and Defense-Enhancing Effects
Potassium phosphite can activate plant defense responses, such as systemic acquired resistance (SAR), helping to reduce the incidence and severity of pathogen infections (especially from oomycete pathogens). This “nutrient + defense” dual functionality allows fertilizer makers to highlight added value in their products. -
Stabilization and Chelation
Potassium Dihydrogen Phosphite exhibits chelation ability for divalent cations (e.g., Ca²⁺, Mg²⁺), contributing to solution stability in high-mineral liquid fertilizers. This reduces precipitation risk and enhances the shelf life and reliability of the final product. -
Environmental Safety
Potassium phosphite is non-toxic, residue-free, and considered environmentally friendly when used in agricultural formulations. This aligns well with the growing demand for “green” and sustainable fertilizer solutions.
Applications of Potassium Dihydrogen Phosphite in Liquid Fertilizer Manufacturing
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Foliar / Spray Fertilizers
Used in foliar sprays, KH₂PO₃ improves nutrient absorption and helps plants resist stress and diseases. The systemic nature of phosphite ensures that its benefits reach critical tissues. -
Fertigation & Drip Irrigation Systems
Integrated into irrigated fertilizer programs (e.g., drip or fertigation), it delivers P and K efficiently to the root zone, increasing nutrient use efficiency and reducing wastage. -
Concentrated Liquid Stocks (Mother Liquids)
As a core raw material in concentrated mother liquids, KH₂PO₃ enables liquid fertilizer producers to create premium-grade, market-differentiated products with high nutrient density. -
Specialty Crops & High-Value Agriculture
Ideal for fruit trees, greenhouse vegetables, ornamental plants, and other high-value crops where both nutrition and stress resistance are critical.
Recommended Usage Guidelines
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Foliar Application: 1–2 L/ha (depending on crop and growth stage)
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Drip / Fertigation: 2–4 L/ha for irrigation-based systems
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Mother Liquid Design: Adjust concentration based on solubility and target final formula
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Tank Mixing: Generally compatible with many common fertilizer and pesticide inputs; avoid co-mixing with strong acids or oxidizing agents without compatibility testing
Why Choose Our Potassium Dihydrogen Phosphite?
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Stable, High-Purity Supply — Produced under strict quality control to meet industrial and agricultural liquid fertilizer standards
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Documentation & Regulatory Support — Full technical data, safety data, and export documentation available for global fertilizer formulators
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Customization Services — We support customization of concentration, grades, and packaging to suit your liquid fertilizer production needs
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Technical & After-Sales Support — Expert guidance on formulation, compatibility testing, and application strategies
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Sustainable & Strategic Raw Material — Provide your customers with a green, high-value nutrient that enhances both growth and plant resilience
