Diammonium Phosphate (DAP 21-53-0) - High Quality Fertilizer Grade 25kg

Soluble DAP 21-53-0 Diammonium Phosphate 99% – Technical Grade Water-Soluble Fertilizer for Root Development & Tillering (25Kg Bag)

Soluble DAP 21-53-0 (chemical designation: Diammonium Phosphate 99, molecular formula (NH₄)₂HPO₄) is an industrial-strength, water-soluble plant nutrient formulation directly imported from China. Compliant with technical quality standards for Diammonium Phosphate Tech Grade 99%, this high-potency technical grade dap delivers an ultra-concentrated nutrient ratio of 53.0% available phosphorus pentoxide (P₂O₅) and 21.0% ammoniacal nitrogen (N). Formulated as fine white crystalline granules that dissolve rapidly without insoluble residue, this soluble dap fertilizer china functions as an essential rooting catalyst and tillering stimulant across commercial fruit orchards, paddy rice, and automated greenhouse fertigation systems. It is the premier choice for commercial plantations and agricultural distributors looking to procure bulk diammonium phosphate 25kg bags or buy dap 21-53 bulk at wholesale pricing.

Technical Specification Standards – Diammonium Phosphate DAP 21-53-0 (Guaranteed Standard)

Agronomic Mechanism & Key Technological Advantages

• High Nutrient Density (21% N + 53% P₂O₅): Supplying a high concentration of water-soluble phosphate paired with ammoniacal nitrogen, DAP stimulates early-stage plant vigor. Ammoniacal nitrogen (NH₄⁺) fuels protein and chlorophyll synthesis for vegetative canopy development, while soluble phosphate (HPO₄²⁻) powers cellular energy synthesis (ATP), driving metabolic activity from seedling establishment onward.
• Rapid Lateral Root Proliferation & Vigorous Tillering: Delivering 53% phosphate, DAP activates root apical meristem division, driving lateral root branching and capillary feeder root formation. In cereal crops like paddy rice, it promotes productive tillering, thickens stalk bases, and prevents wind lodging during monsoon conditions.
• Root System Rehabilitation After Waterlogging: When root systems suffer from anoxia, acid sulfate soils, or organic toxicity during wet periods, drenching with soluble DAP accelerates the regeneration of damaged root caps. In perennial fruit trees, it supports synchronous post-harvest vegetative flushes and strong shoot caliper growth.
• 99% Tech Grade Purity – Low Insoluble Content: Free of heavy metals and low in fluoride (≤ 0.01%), soluble DAP prevents root scorch. With water-insoluble matter kept below 0.6%, it dissolves into a clear solution suitable for precision drip fertigation, pivot systems, and foliar spray equipment.

Practical Applications in Agriculture & Industrial Processing

Engineered for high solubility and nutrient availability, technical grade dap serves key functional roles across cropping and technical sectors:

• Commercial Orchards (Durian, Citrus, Mango, Longan, Avocado):
  • Establishment & Post-Harvest: Drenched around the drip line to drive root branching and vegetative flush emergence following harvest pruning.
  • Canopy Development: Promotes thick, dark-green foliage and sturdy shoots prior to floral induction phases.
• Paddy Rice & Cereal Grains: Applied as a top-dressing or drench during tillering (15 – 25 days after sowing) to promote deep root anchoring, maximize productive panicles, and improve grain filling.
• Open-Field Vegetables & Floriculture: Stimulates rapid seedling establishment after transplanting, builds sturdy stems, and improves resistance against seasonal weather stress.
• Industrial Flame Retardancy: Acts as an efficient fireproofing chemical agent for timber, paper, ceiling insulation, and industrial textiles by lowering pyrolysis temperatures.
• Industrial Bio-Fermentation: Supplies essential nitrogen and phosphorus nutrients for commercial yeast cultivation and bacterial fermentation media.

Recommended Agronomic Application Rates & Dosing Guidelines

• Seedling Establishment & Root Recovery (Post-Transplanting / Post-Harvest):
  • Dilution Rate: Dissolve 40 – 60 g per 16 – 25 Litres of water (equivalent to 500 g – 1 kg per 200 Litre drum).
  • Application Method: Drench around the root zone every 7 to 10 days (apply 2 – 3 consecutive rounds) to encourage rapid root expansion.
• Paddy Rice & Short-Cycle Field Vegetables:
  • Application Rate: Dissolve 50 – 80 g per 25 Litre sprayer; apply during the active tillering phase to maximize tiller count.
• Fruit Tree Vegetative Flush Induction:
  • Application Rate: Dissolve 1 – 2 kg per 200 Litre drum; drench the root zone combined with a light canopy spray when new bud eyes emerge.
• Automated Drip Fertigation:
  • In-line Concentration: Inject into irrigation lines at concentrations of 1.0 – 2.0 g per Litre of irrigation water, calibrated to the targeted crop growth stage and electrical conductivity (EC) requirements.

Commercial Supply Policy at THP Chemical

Tan Hung Phu Chemical Co., Ltd. (THP Chemical) is a direct importer and wholesale distributor of Soluble DAP 21-53-0 Diammonium Phosphate 99% (25kg Bag China) supplying agricultural cooperatives, commercial plantations, and distributors nationwide[cite: 3]:

• Certified compliant with technical standards for Diammonium Phosphate Tech Grade 99%, guaranteeing P₂O₅ ≥ 53.0% and N ≥ 21.0%.
• Original factory-sealed 25.0 KGS Net packaging (Gross Weight: 25.1 KGS) with heavy-duty moisture-proof inner PE liners and a fresh 36-month shelf life.
• Comprehensive compliance documentation: Batch-specific factory Certificate of Analysis (COA), 16-section Material Safety Data Sheet (MSDS), and legal commercial VAT invoices provided with each dispatch.
• Substantial ready-stock inventories maintained at our central Ho Chi Minh City logistics center, supporting rapid palletized dispatch nationwide at competitive wholesale volume pricing[cite: 3].

Frequently Asked Questions (FAQ)

1. What is the fundamental difference between Soluble White DAP 21-53-0 and standard Black DAP?

Conventional black or brown DAP (18-46-0) contains insoluble mineral rock residues, dissolves slowly, and is designed strictly for dry soil broadcasting. In contrast, Soluble White DAP 21-53-0 is refined to Tech Grade purity (≥ 99.0%), dissolves completely in water without sludge, and is designed for soil drenching, foliar spraying, and automated drip fertigation.

2. Can Soluble DAP 21-53-0 be mixed with Calcium Nitrate in concentrated stock tanks?

No. Concentrated phosphate ions (HPO₄²⁻) react with calcium ions (Ca²⁺) to form insoluble Calcium Phosphate precipitates that clog drip emitters. Keep them in separate A and B stock tanks and blend only upon final diluted injection into irrigation lines.

3. Why is DAP 21-53-0 preferred for early-stage root establishment?

DAP delivers 53% fully soluble phosphate paired with 21% ammoniacal nitrogen. This balance supplies energy (ATP) for root cell division while providing nitrogen to build green leaf canopy without burning delicate feeder roots.

4. Does THP Chemical provide batch COAs and VAT invoices for bulk orders?

Yes. THP Chemical supplies factory Certificates of Analysis (COA) corresponding to each production batch, 16-section MSDS sheets, and commercial VAT invoices with every wholesale order to satisfy corporate procurement and GlobalGAP compliance audits[cite: 3].