Trisodium Phosphate CAS#7601-54-9
Strong Alkalinity for High Cleaning Efficiency – Forms a highly alkaline solution (pH ≈ 11.5), making it very effective for degreasing, cleaning, and pH adjustment applications.
Excellent Water Solubility – Readily dissolves in water at room temperature, allowing fast preparation of concentrated alkaline solutions for industrial and processing use.
Stable Hydrated Crystal Structure – Retains part of its crystallization water even at elevated temperatures, ensuring good thermal stability and reliable performance during heating and storage.
High Purity Crystalline Form – White to colorless hexagonal crystals provide consistent quality, easy handling, and suitability for precise formulation and dosing.
Product Description of Trisodium Phosphate (CAS No. 7601-54-9)
Trisodium Phosphate dodecahydrate appears as white to colorless hexagonal crystals with a density of approximately 1.62 g/cm³. It melts at around 75 °C under rapid heating conditions and partially loses its water of crystallization at 100 °C, while retaining the final water molecule even at higher ignition temperatures.
The product is readily soluble in water, with a solubility of about 28 g per 100 mL at 20 °C, forming a strongly alkaline solution. A 0.1 M aqueous solution has a pH of approximately 11.5. Trisodium Phosphate is insoluble in alcohol and is widely used in applications requiring a strong alkaline agent and effective water solubility.
Parameters
| Melting point | 1340°C |
| density | 2.536 g/cm3(Temp: 17.5 °C) |
| vapor pressure | 0Pa at 20℃ |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | H2O: slightly soluble(lit.) |
| form | Powder |
| color | White |
| Odor | at 100.00?%. odorless |
| PH | 10.95(1 mM solution);11.71(10 mM solution);12.12(100 mM solution) |
| Water Solubility | Soluble in water. Insoluble in ethanol and carbon disulfide. |
| Sensitive | Hygroscopic |
| Merck | 148,662 |
| Dielectric constant | 1.6（Ambient） |
| InChI | InChI=1S/3Na.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3*+1;/p-3 |
| InChIKey | RYFMWSXOAZQYPI-UHFFFAOYSA-K |
| SMILES | [Na+].[Na+].[Na+].P([O-])([O-])([O-])=O |
| CAS DataBase Reference | 7601-54-9(CAS DataBase Reference) |
| EPA Substance Registry System | Trisodium phosphate (7601-54-9) |
Safety Information
| Hazard Codes | C,Xi |
| Risk Statements | 34-36/37/38 |
| Safety Statements | 26-36/37/39-45-24/25 |
| RIDADR | UN 3262 8/PG 3 |
| WGK Germany | 1 |
| RTECS | TC9490000 |
| F | 34 |
| TSCA | Yes |
| HazardClass | 8 |
| PackingGroup | III |
| HS Code | 28352910 |
| Hazardous Substances Data | 7601-54-9(Hazardous Substances Data) |
| Toxicity | LD50 skin in rabbit: > 300mg/kg |
Product Application of Trisodium Phosphate (CAS No. 7601-54-9)
Trisodium Phosphate is an inorganic salt widely used as a powerful industrial detergent, metal surface treatment agent, and floor cleaner. It is well known for its strong cleaning and degreasing performance.
TSP is also applied as a water softener and boiler water treatment chemical, as well as a paint remover in surface preparation processes. In addition, it is used in photographic developers, leather tanning, paper manufacturing, and sugar clarification, demonstrating its broad versatility across multiple industrial and processing applications.
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