Monoammonium phosphate
General Product Information
| Article | Monoammonium phosphate |
| Synonyms | ADP, Ammonium dihydrogen phosphate, MAP, Monoammonium phosphate |
| CAS No. | 7722-76-1 |
| EEG No. | – |
| EINECS No. | 231-764-5 |
| IMO | – |
| Tariff Code | 31054000 |
| UN No. | – |
| VLG/ADR | – |
Description
Monoammonium phosphate (MAP) is an inorganic salt. It is an important source of nitrogen (N) and phosphorus (P), essential for plant growth. MAP is often used in water-soluble fertilizers and is suitable for application through irrigation systems.
Characteristics
- Odor: Odorless.
- Hygroscopic: Yes.
- Color: White.
- Grade: Food.
- Solubility: Highly soluble in water.
- Taste: –
- Shape: crystalline grains.
Physical & Chemical Properties
| Chemical Structure | NH4H2PO4 |
| Molar Weight | 115.03 g/mol |
| Melting Point | Approx. 190 °C (decomposes). |
| Boiling Point | Approx. 158°C |
| Density | Approx. 1.8 g/cm³. |
| Refractive Index | – |
| pH | 4.2 – 4.7 (on 1% solution) |
Applications
Monoammonium phosphate is applied in various ways, for instance:
1. Agriculture
Monoammonium phosphate is a commonly used component in compound fertilizers. Its combination of nitrogen (N) and phosphorus (P) makes it ideal for use during the early growing season of crops, when root development is crucial. MAP is applied both in dry form and dissolved in irrigation systems (fertigation)….
2. Food Industry
Sometimes used as a food additive.
Interessing Links
- Codex Alimentarius (FAO/WHO) – Guidelines and standards for food additives and ingredients.
- European Chemicals Agency (ECHA) – For chemical information and regulations.
- European Food Information Council (EFIC)
- European Food Safety Authority (EFSA) – Information on the safety and uses of food additives and ingredients.
- PubChem – Ammonium phosphate, monobasic – Chemical information by the National Library of Medicine of the National Center for Biotechnology Information (NIH-NCBI).
- Wikipedia – Ammonium dihydrogen phosphate