Disodium Phosphate Dodecahydrate
DSP, Disodium Hydrogen Phosphate, Sodium Phosphate Dibasic.
- CAS
- 10039-32-4
- EC
- 231-448-7
- Sectors
- Water & Wastewater Treatment, Food & Nutrition, Textiles, Leather & Paper
Disodium Phosphate Dodecahydrate (CAS 10039-32-4) is a highly soluble inorganic salt that appears as white crystals, a dibasic sodium phosphate carrying 12 molecules of water, used as a buffering agent and emulsifier in dairy and processed foods and as a corrosion inhibitor in boiler water treatment. Our Food Grade crystals are manufactured to meet stringent purity standards for use in dairy and processed foods.
In water treatment, it serves as an effective corrosion inhibitor and sequestration agent for industrial boiler systems. It helps prevent mineral scale buildup and stabilizes pH levels in large-scale cooling circuits.
The Dodecahydrate form contains 12 molecules of water, making it a stable, easy-to-dissolve crystalline solid. It is also utilized in the textile industry as a dye fixative and in the pharmaceutical sector as a mild saline laxative.
Typical Properties
| Molecular formula | H3O4P.12H2O.2Na |
|---|---|
| Molecular weight | 358.14 g/mol |
| Appearance | white crystals |
| Form | Crystals |
| Color | White |
| Odor | Odorless |
| Melting point | 35 °C |
| Density | 1,52 g/cm 3 |
| Water solubility | 218 g/L (20 °C) |
| pH | 9.0-9.3 (25°C, 50mg/mL in H2O) |
| HS code | 28352200 |
| Grades available | Food Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Disodium Phosphate Dodecahydrate
Applications
- Dairy Processing: Prevents protein coagulation in evaporated milk and acts as a melt-stabilizer in processed cheese.
- Water Conditioning: Used in boiler water treatment to control scale and inhibit corrosion in metal piping.
- Textile Dyeing: Functions as a pH buffer and weighting agent in the processing of silk and other delicate fabrics.
Safety & Risks
Causes Eye Irritation. Avoid dust formation; use Gloves and Safety Goggles during charging and mixing operations.
Packaging
25 kg Bags or 1000 kg Big Bags.