tri Sodium phosphate dodecahydrate
| Formula | Na3O4P*12H2O |
| Chemical formula | Na3O4P*12H2O |
| Density | 1.62 g/cm3 (20°C) |
| Molar mass | 380.18 g/mol |
| Bulk density | ~620 kg/m3 |
| CAS number | 10101-89-0 |
| HS Code | 28352300 |
| EC number | 231-509-8 |
| Storage | Without limitation |
| SDS | available |
| RTECS | TC9575000 |
| R phrase | R 36/38 |
| Odour | odourless |
| Form | crystals |
| Color | colourless to white |
| p H | ~12 (10g/l 20 °C) |
| Solubility in water | 285 g/l (20°C) |
| Solubility in ethanol | insoluble |
| Melting point | ~75 °C |
| Assay | ≥ | 92 | % |
| Description | Conforms | ||
| Identification | Conforms | ||
| Solubility | Conforms | ||
| Insoluble matter | ≤ | 0.02 | % |
| Loss on ignition | 45.0 – 57.0 | % | |
| Heavy metals | ≤ | 0.001 | % |
| Arsenic | ≤ | 0.0003 | % |
Trisodium phosphate dodecahydrate is a white crystalline inorganic compound used primarily as a cleaning agent, water softener, and in industrial formulations.
🏭⚗️ Production
It is typically produced by reacting phosphoric acid with sodium carbonate or sodium hydroxide, followed by controlled crystallization to form the dodecahydrate (12-hydrate) form.
🔬 Properties
The chemical formula is Na₃PO₄·12H₂O with a molar mass of approximately 380.14 g/mol. It appears as white, odorless crystals that are highly soluble in water, forming a strongly alkaline solution. It is stable under normal conditions but loses water of crystallization when heated.
🧪 Applications
Trisodium phosphate dodecahydrate is widely used as a degreasing and cleaning agent in industrial and household products, a water softener in detergents, and a builder in cleaning formulations. It is also used in textile processing, ceramics, and as a flux in metallurgy.
⚠️ Safety
This compound is strongly alkaline and can cause irritation or burns to skin, eyes, and mucous membranes upon contact. Inhalation of dust should be avoided. Use gloves, eye protection, and ensure good ventilation during handling. Store in a tightly sealed container in a dry area, away from acids and moisture.
