Monoammonium phosphate (MAP) is one of the most concentrated solid phosphate fertilizers available, and its use extends far beyond agriculture. For buyers seeking consistent quality and a trustworthy supply chain, understanding the fundamentals of MAP is the first step.
This article provides scientifically accurate information about MAP and explains why Snowhite Chemical Co., Ltd. can be your dependable partner.
What Is Monoammonium Phosphate?
Monoammonium phosphate (CAS No.:7722-76-1), also known as ammonium dihydrogen phosphate, has the chemical formula NH₄H₂PO₄ and a molecular weight of 115.03 g/mol. It typically appears as white tetragonal crystals or crystalline powder. Key physical properties include:
• Density: approximately 1.80 g/cm³
• Melting point: 190 °C
• Water solubility: ~370 g/L at 20 °C
• pH (1% aqueous solution): 4.4–4.6
These well-established characteristics make MAP an efficient carrier of both phosphorus and nitrogen for multiple industries.
Common Product Specifications
The parameters below represent standard grades commonly traded in global markets:
• Purity (NH₄H₂PO₄): ≥98.0% (up to 99.0%)
• Phosphorus pentoxide (P₂O₅): ≥61.0%
• Total Nitrogen (N): ≥12.0%
• NPK ratio: 12-61-0
• Water insoluble matter: ≤0.10%
• Moisture: ≤0.20%
Key Applications
1. Agriculture & Horticulture
MAP’s 12-61-0 NPK ratio makes it an ideal starter fertilizer, delivering high phosphorus for root development and ammonium nitrogen for early growth. Its rapid dissolution and slightly acidic pH around the granule enhance phosphorus availability, especially in neutral to high-pH soils. It is also widely used in water-soluble NPK blends, fertigation systems, and foliar nutrition.
2. Fire Retardant
MAP is a core ingredient in dry powder fire extinguishers and fire-retardant coatings for wood, textiles, paper, and plastics. Upon heating, it decomposes and forms a protective char, acting as an effective, low-toxicity flame retardant.
3. Food Processing
Food-grade MAP serves as a pH regulator, leavening acid, and fermentation nutrient in various food and beverage products.
4. Water Treatment
It is applied in industrial water systems to inhibit scaling and corrosion, and sometimes used in remineralization processes for drinking water.
5. Animal Nutrition
High-purity MAP provides bioavailable phosphorus and nitrogen as a mineral supplement in animal feed.
Sourcing MAP: Quality Matters
MAP is a globally produced commodity, with China being a significant manufacturing hub. Prices reflect the cost of raw materials such as phosphate rock and sulfur, and can fluctuate due to seasonal demand and supply chain dynamics. For the most up-to-date pricing in your region, direct consultation with a manufacturer is always recommended.
Why Partner with Snowhite Chemical?
Snowhite Chemical Co., Ltd. is a specialized manufacturer and global supplier of fine chemicals. Our core focus is on delivering high-quality phosphate products with reliability and transparency.
What you can expect when working with us:
• Consistent Quality: Strict in-house quality control ensures batch-to-batch uniformity.
• Professional Service: We respond with technical documentation, COAs, and samples promptly.
• Flexible Supply: We accommodate diverse packaging and logistics needs to serve markets worldwide.
We do not just sell chemicals — we help our clients build stable, efficient supply chains.
Contact Us
Contact SNOWHITE CHEMICAL CO., LTD now to get COA, free samples and the latest quotation.
Email: shirley@snowhitechem.com
Phone: +86-25-56215758
WhatsApp：+86-13776524331
