Monosodium Phosphate
MSP, Monobasic Sodium Phosphate, Sodium Dihydrogen Phosphate
- CAS
- 7558-80-7
- EC
- 231-449-2
- Food Code
- E339
- Sectors
- Food & Nutrition, Pharma & Healthcare, Water & Wastewater Treatment
Monosodium Phosphate (CAS 7558-80-7) is the monobasic sodium salt of phosphoric acid, a white, slightly deliquescent crystalline powder with mild acidity and high solubility that serves as a buffering and sequestering agent in food processing, pharmaceutical production and water treatment.
Typical Properties
| Molecular formula | H3O4P.Na |
|---|---|
| Molecular weight | 119.98 g/mol |
| Appearance | White, slightly deliquescent crystals or granules. |
| Form | powder |
| Color | White |
| Odor | at 100.00?%. odorless |
| Melting point | 60 °C |
| Boiling point | 100°C |
| Density | 1.40 g/mL at 20 °C |
| Water solubility | Soluble in water. Insoluble in alcohol,ether and chloroform. |
| pH | 4.0 - 4.5 (25°C, 50g/L in water) |
| GHS signal word | Warning · Irritant / harmful |
| 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.
Monosodium Phosphate
Applications
Used in food processing, pharmaceuticals, and water treatment. Acts as a pH regulator, emulsifier, and stabilizer in formulations. Also applied in detergents and metal cleaning compounds.
Safety & Risks
Non-toxic but may irritate skin or eyes; avoid dust inhalation.
Packaging
Supplied in 25 kg PE-lined paper bags or bulk sacks. Store cool, dry, and sealed.