Sodium phosphate monobasic CAS#7558-80-7
Available in multiple forms: white powder, granules, or colorless to white crystalline powder, providing flexibility for different applications.
Relatively soluble in water, making it easy to prepare aqueous solutions.
Slightly acidic aqueous solution (pH around 4.5), suitable for applications requiring mild acidity.
Insoluble in ethanol and only slightly soluble in chloroform, ensuring stability in non-aqueous solvents.
Products Description of Sodium Phosphate Monobasic CAS#7558-80-7
The anhydrous form appears as a white powder or granules, while the dihydrate form occurs as colorless to white crystals or crystalline powder. It is moderately soluble in water, producing an acidic solution with a typical pH of around 4.5. It is practically insoluble in ethanol and only slightly soluble in chloroform.
Parameters
| Melting point | <0°C |
| Boiling point | 100°C |
| bulk density | 940kg/m3 |
| density | 1.40 g/mL at 20 °C |
| vapor pressure | 0Pa at 20℃ |
| storage temp. | room temp |
| solubility | H2O: 5 M, clear, colorless |
| form | powder |
| color | White |
| Odor | at 100.00?%. odorless |
| PH | 4.0 - 4.5 (25℃, 50g/L in water) |
| pka | (1) 2.15, (2) 6.82, (3) 12.38 (at 25℃) |
| Water Solubility | Soluble in water. Insoluble in alcohol,ether and chloroform. |
| λmax | λ: 260 nm Amax: ≤0.025 |
| λ: 280 nm Amax: ≤0.02 | |
| Sensitive | Hygroscopic |
| Merck | 148,660 |
| BRN | 3903772 |
| Stability: | Stable. Incompatible with heavy metals, strong acids. |
| InChIKey | AJPJDKMHJJGVTQ-UHFFFAOYSA-M |
| LogP | -2.148 (est) |
| CAS DataBase Reference | 7558-80-7(CAS DataBase Reference) |
| EPA Substance Registry System | Monosodium phosphate (7558-80-7) |
| Absorption | ≤0.2 at 260 in H2O at 1M |
| ≤0.2 at 280 in H2O at 1M |
Safety Information
| Hazard Codes | Xi |
| Risk Statements | 36/37/38-36 |
| Safety Statements | 26-36-39 |
| WGK Germany | 1 |
| RTECS | WA1900000 |
| F | 3 |
| TSCA | Yes |
| HS Code | 28352200 |
| Hazardous Substances Data | 7558-80-7(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 8290 mg/kg LD50 dermal Rabbit > 7940 mg/kg |
Product Application of Sodium Phosphate Monobasic CAS#7558-80-7
Sodium phosphate monobasic monohydrate is widely used as a sequestrant, emulsifier, mordant in dyeing, and as a reagent and buffer in food and analytical chemistry. It has also been applied as a fireproofing agent and for weighting silk in tanning processes. Additionally, it is utilized in the production of enamels, ceramics, detergents, boiler compounds, and serves as a substitute for borax in soldering and brazing.
