Trisodium Phosphate CAS#7601-54-9
High purity crystalline form — Exists as white or colorless hexagonal crystals.
Good water solubility — Dissolves at about 28 g/100 mL in water at 20°C.
Strong alkalinity — Produces a highly alkaline solution with pH around 11.5 (0.1M).
Thermal stability of water content — Retains final water molecule even under prolonged heating.
The dodecahydrate is a white or colorless hexagonal crystal with a density of 1.62 g/cm³. It melts around 75°C when heated quickly and begins to lose its crystallized water at 100°C. Even with sustained heating, it retains the final water molecule. It is soluble in water, with a solubility of approximately 28 g/100 mL at 20°C. The resulting solution is strongly alkaline, with a pH of 11.5 for a 0.1M solution. It is insoluble in alcohol.
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 | |
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 | 14,8662 |
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 |
Trisodium phosphate (TSP) is an inorganic salt commonly used in industrial detergents, metal treatment, and restroom floor cleaners. TSP offers potent cleansing properties and is utilized as a water softener, for treating boiler water, as a paint remover, in photographic development, for tanning leather, in paper manufacturing, and for clarifying sugar.
