Ammonium Phosphate Mono

Agricultural Grade (MAP) · Food Grade — Bulk supply across India & International Markets

What is Ammonium Phosphate Mono?

Ammonium Phosphate Mono (MAP), chemically known as Monoammonium Phosphate (NH4H2PO4), is a highly water-soluble fertiliser salt that provides both nitrogen and phosphorus — two essential plant macronutrients — in a single granule or crystal. It is one of the most widely used starter fertilisers globally due to its high phosphorus content and complete water solubility, making it valuable for both granular soil application and fertigation systems.

Polychem Industries supplies Ammonium Phosphate Mono in agricultural grade (MAP) and food grade to fertiliser manufacturers, hydroponic suppliers, and food and beverage fermentation industries across India and internationally. Its dual nutrient content and excellent water solubility make it one of the most versatile phosphate fertilisers available, while its food-grade form serves as an important yeast nutrient in fermentation applications.

Available Grades

GradeFormPurityStandardApplications
Agricultural Grade (MAP)White crystalline powder/granules98%+ (Agricultural / Food Grade)Fertiliser / AgriculturalFertigation, starter fertilisers, foliar feeding, hydroponics
Food GradeWhite crystalline powder99%+FSSAI / FCCYeast nutrient, baking, brewing fermentation aid

Applications & Uses

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Starter Fertilisers & Fertigation

One of the most widely used starter fertilisers globally. MAP provides readily available phosphorus critical for early root development, along with nitrogen, making it particularly valuable when applied at planting time or through fertigation systems during early crop growth stages.

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Hydroponics & Soilless Culture

Used as a primary phosphorus and nitrogen source in hydroponic nutrient solutions due to its complete water solubility and well-characterised nutrient release, making precise nutrient formulation straightforward for growers.

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High-Value Horticultural Crops

Used extensively in vegetable, fruit, and flower production where rapid, available phosphorus is critical for root establishment, flowering, and overall crop development, particularly during early growth stages.

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Brewing & Fermentation (Food Grade)

Food Grade MAP is used as a yeast nutrient in brewing and fermentation processes, providing essential phosphorus and nitrogen that supports healthy yeast metabolism and fermentation performance.

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Baking Yeast Nutrition (Food Grade)

Used in certain baking applications as a yeast nutrient additive, supporting yeast activity and fermentation performance in bread and baked goods production.

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Compound Fertiliser Blending

Used as a component in NPK compound fertiliser blends, providing a concentrated, soluble source of phosphorus and nitrogen suited to various blended fertiliser formulations for different crop and soil requirements.

Technical Specifications

Ammonium Phosphate Mono — Key Properties

Chemical FormulaNH4H2PO4
CAS Number7722-76-1
Molecular Weight115.03 g/mol
AppearanceWhite crystalline powder/granules
Purity98%+ (Agricultural / Food Grade)
Melting Point190°C (decomposes)
Density / Bulk DensityBulk density: 0.9–1.1 g/cm3
pH4.0 – 4.5 (5% solution, acidic)
Packaging Available25 kg / 50 kg bags
StorageStore in cool, dry place away from moisture. Non-hygroscopic and chemically stable in normal storage conditions.

Why Source Ammonium Phosphate Mono from Polychem Industries?

  • Agricultural Grade (MAP) and Food Grade available
  • Certificate of Analysis available on request
  • High phosphorus content with complete water solubility
  • Reliable bulk supply for fertiliser, hydroponic and brewing industries
  • Competitive pricing with consistent year-round availability
  • Export documentation experience for international shipments

Frequently Asked Questions

Why is MAP particularly valued as a starter fertiliser?
MAP provides a concentrated, immediately available source of phosphorus, which is critical for early root development and plant establishment, especially in cold or phosphorus-deficient soils where phosphorus mobility is naturally limited. Applying MAP at or near planting time ensures young plants have access to this essential nutrient right when root systems are developing and most in need of phosphorus.
What is the difference between MAP and DAP (Diammonium Phosphate)?
MAP (Monoammonium Phosphate) and DAP (Diammonium Phosphate) are both ammonium phosphate fertilisers but differ in their nitrogen-to-phosphorus ratio and pH characteristics. MAP has a lower nitrogen content and is acidic in reaction, making it more suitable for alkaline soils or situations where a slight soil acidification is beneficial. DAP has higher nitrogen content and is more alkaline, suited to different soil and crop management strategies.
How is MAP used as a yeast nutrient in brewing?
Food Grade MAP provides readily available phosphorus and nitrogen that yeast require for healthy cell growth and efficient fermentation. In brewing and other fermentation processes, particularly those using nutrient-poor substrates like certain fruit musts or specialty beverages, MAP supplementation helps ensure complete, healthy fermentation and can help avoid stuck or sluggish fermentations.
Do you export Ammonium Phosphate Mono outside India?
Yes. We export to Bangladesh, Sri Lanka, Nepal, Bhutan, and South Africa with full export documentation. Contact us for export pricing and lead times.

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