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Technical Specifications
Basic Information
| Item | Parameters |
|---|---|
| Product Name | Monoammonium Phosphate |
| English Name | Monoammonium Phosphate (MAP) |
| CAS Number | 7722-76-1 |
| Chemical Formula | NH4H2PO4 |
| Molecular Weight | 115.0 |
| Appearance | White Granular Crystals |
| Relative Density | 1.0803 |
| Melting Point | 190℃ |
Physicochemical Properties
| Item | Description |
|---|---|
| Appearance | White Granular Crystals |
| Water Solubility | Easily Soluble in Water |
| Alcohol-soluble | Slightly soluble in alcohol |
| Ketone Solubility | Insoluble in Ketones |
| Relative Density | 1.0803 |
| Melting Point | 190℃ |
| pH (1% aqueous solution) | 0 — 5.0, acidic |
Technical Specifications — Industrial Grade (Wet Process) (HG/T4133-2010)
| No. | Indicator Name | Requirement |
|---|---|---|
| 1 | Main content (as NH4H2PO4) % ≥ | 98 |
| 2 | P2O5 % ≥ | 60.5 |
| 3 | Nitrogen (N) % ≥ | 11.5 |
| 4 | pH of 1% Aqueous Solution | 4.0 — 5.0 |
| 5 | Water Insolubles % ≤ | 0.3 |
| 6 | Moisture (H₂O) % ≤ | 0.5 |
| 7 | Sulfate (as SO4) % ≤ | 1.2 |
Technical Specifications — Industrial Grade (Thermal Process) (HG/T4133-2010)
| No. | Indicator Name | Requirement |
|---|---|---|
| 1 | Main content (as NH4H2PO4) % ≥ | 99 |
| 2 | P2O5 % ≥ | 61 |
| 3 | Nitrogen (N) % ≥ | 12 |
| 4 | pH of 1% Aqueous Solution | 4.2 — 4.8 |
| 5 | Water Insolubles % ≤ | 0.1 |
| 6 | Moisture (H₂O) % ≤ | 0.5 |
| 7 | Arsenic (as As) % ≤ | 0.005 |
| 8 | Fluoride (as F) % ≤ | 0.02 |
| 9 | Heavy metals (as Pb) % ≤ | 0.005 |
| 10 | Sulfate (as SO4) % ≤ | 0.9 |
Technical Specifications — Food Grade (GB 25569-2010)
| No. | Indicator Name | Requirement |
|---|---|---|
| 1 | Main content (as NH4H2PO4) % ≥ | 99 |
| 2 | P2O5 % ≥ | 61 |
| 3 | Nitrogen (N) % ≥ | 12 |
| 4 | pH of 1% Aqueous Solution | 4.3 — 5.0 |
| 5 | Water Insolubles % ≤ | 0.1 |
| 6 | Moisture (H₂O) % ≤ | 0.2 |
| 7 | Arsenic (as As) % ≤ | 0.0003 |
| 8 | Fluoride (as F) % ≤ | 0.001 |
| 9 | Heavy metals (as Pb) % ≤ | 0.001 |
| 10 | Lead (as Pb) % ≤ | 0.0004 |
Packaging & Storage
| Item | Note |
|---|---|
| Packaging Method | Inner Plastic, Outer Woven |
| Packaging Specifications | 25 kg/bag, 50 kg/bag, 1000 kg/bag (ton bag) |
| Storage Conditions | Store in a cool, dry, and well-ventilated place |
| Shelf Life | 24 months (when stored sealed) |
Product Introduction
Product Overview
Monoammonium Phosphate (MAP), CAS No. 7722-76-1, chemical formula NH₄H₂PO₄, molecular weight 115.0. White granular crystals, relative density 1.0803, melting point 190°C, easily soluble in water, slightly soluble in alcohol, insoluble in ketones.
Physicochemical Properties
- AppearanceWhite granular crystals
- Water SolubilityEasily Soluble in Water
- Alcohol-solubleSlightly Soluble in Alcohol
- Ketone SolubilityInsoluble in Ketones
- Relative Density: 1.0803
- Melting Point: 190℃
- pH1% aqueous solution pH 4.0-5.0, acidic
Specifications & Standards
| Grade | Implementation Standard | Main Applications |
|---|---|---|
| Industrial Grade (Wet Process) | HG/T4133-2010 | Agricultural fertilizer, flame retardant, industrial uses |
| Industrial Grade (Thermal Process) | HG/T4133-2010 | High-purity requirements, precision industries |
| Food Grade | GB 25569-2010 | Food processing, leavening agent, feed additive |
Nutrient Indicators
Application Reference
Agricultural Production
It is a high-efficiency nitrogen-phosphorus compound fertilizer, suitable for foliar fertilization, fertigation, drip and sprinkler irrigation fertilization, and also used in formulating N, P, K compound fertilizers.
- Foliar Fertilization
- Flushing Fertilizer
- Drip Irrigation, Sprinkler Irrigation Fertilization
- N, P, K Compound Fertilizer Formulation
Flame Retardant Applications
Primarily used as a fire retardant for wood, paper, and fabrics, and as an additive in fire-resistant coatings.
- Wood Fire Retardant
- Paper Flame Retardant
- Fabric Fire Retardant Treatment
- Matchstick and Candle Wick Ash Extinguishing Agent
- Fire Retardant Coating Additive
- Dry Powder Fire Extinguishing Agent
Industrial Applications
Dispersing agent for fiber processing and dye industry, enamel glaze, also used in printing plate making, etc.
- Fiber Processing Dispersant
- Dye Industry Dispersant
- Enamel Frit
- Printing Plate Making
Food Industry
Used as a leavening agent, conditioner, buffer, etc., compliant with GB 25569-2010 standard.
- Starter Culture
- Regulator
- Buffer
Feed Additive
Used as an animal feed additive to provide phosphorus nutrition.
- Feed Phosphorus Source
- Nutritional Fortifier
Pharmaceutical Manufacturing
For pharmaceutical manufacturing.
- Pharmaceutical Intermediates
- Culture Medium Raw Materials
- Store in a cool, dry, well-ventilated place, avoiding direct sunlight and damp environments.
- The product is easily soluble in water, and the resulting solution is acidic; please note to use it in combination.
- Avoid direct mixing with alkaline substances (e.g., lime, sodium hydroxide, etc.) to prevent reactions.
- Keep dry and protected from rain during transport; avoid package damage.
- It is recommended to wear protective gloves and a mask during use to avoid direct skin contact and inhalation of dust.
FAQs
Both are important ammonium phosphate fertilizers, with the main difference being:
- Different Chemical FormulasMAP is NH₄H₂PO₄ (Monoammonium Phosphate), DAP is (NH₄)₂HPO₄ (Diammonium Phosphate)
- Varying Nitrogen ContentMAP contains N≥12%, DAP contains N≥21%, DAP has higher nitrogen content.
- Different Phosphorus ContentMAP has P₂O₅≥61%, DAP has P₂O₅≥53%, MAP has higher phosphorus content.
- Different pH ValuesMAP aqueous solution is more acidic (pH approx. 4.0-5.0), DAP is weakly alkaline.
Products from the two processes each have their own characteristics:
- Main ContentThermal MAP≥99%, Wet-process MAP≥98%, higher purity for thermal method
- Phosphorus ContentThermal P₂O₅≥61%, Wet-process P₂O₅≥60.5%
- Water Insoluble MatterThermal method≤0.1%, Wet-process≤0.3%, thermal method is purer
- Recommended ChoiceFor general agricultural use, the wet process is recommended for its cost-effectiveness; for applications requiring high purity, the thermal process is preferred.
Ammonium dihydrogen phosphate offers significant advantages as a flame retardant:
- Efficient Flame RetardantDecomposes upon heating to produce ammonia and phosphoric acid, forming a protective layer that isolates oxygen
- Wide ApplicabilityCan be used for fireproofing treatment of various materials such as wood, paper, and fabrics
- Special ApplicationsCan be used as a matchstick and candle wick extinguishing agent to prevent re-ignition
- Dry Powder Fire Extinguishing Agentis an important component of dry powder fire extinguishing agents
The main difference lies in impurity content standards and application fields:
- Impurity LimitsFood-grade has stricter requirements for impurities such as arsenic, lead, and heavy metals
- Moisture RequirementFood-grade moisture≤0.2%, stricter than industrial-grade (≤0.5%)
- Implementation StandardFood grade complies with GB 25569-2010, industrial grade complies with HG/T4133-2010.
- Application FieldsFood grade for food processing, fermentation industry, etc.; industrial grade for agriculture, fire retardants, feed, etc.
Our monoammonium phosphate products support multiple packaging specifications:
- 25 kg/bagInner plastic, outer woven, suitable for small to medium batch purchases
- 50 kg/bagInner plastic, outer woven, suitable for general purchasing needs
- 1000 kg/bag (ton bag)Suitable for bulk purchases, lower cost
Packaging: Plastic inner lining with woven outer bag, store in a well-ventilated, dry place.
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