White powder crystal, liquidity is good. Density: Ⅰ density of 2.62 g/cm3, Ⅱ density of 2.57 g/cm3. Melting point: 622 ℃. Solubility: soluble in water, its aqueous solution is alkaline. 20 g / 100 mL (20 ℃).
Sodium tripolyphosphate with different generation temperature has a high temperature type (Ⅰ type) and low temperature type (Ⅱ type), the difference between the two bond length and bond Angle different, Ⅰ and Ⅱ hydration products are generated after six hydrate Na5P3O10 · 6 h2o, under the same conditions, Ⅰ type rapid hydration heat is high, soluble in water are prone to agglomerate phenomenon, this is because the structure of the type Ⅰ four ligand of sodium ions, four ligand has a strong affinity for water, whereas Ⅱ type very slow speed in the water is generated six water content.
Weakly alkaline aqueous solution, sodium tripolyphosphate (1% aqueous solution of PH value of 9.7), it is in the PH range 4.3 ~ 14 water), the formation of the role of the suspension emulsion (similar), namely dispersion effect. Sodium tripolyphosphate can improve liquid and solid particles dissolve in the liquid medium (water), make the solution completely transparent appearance, like a true solution, that is the solubilization. Because the sodium tripolyphosphate has more unique performance, make it become a kind of important ideal of laundry detergent raw materials