Complaint
| Name | Sodium hexametaphosphate(SHMP) |
| Molecular formula | (NaPO3)6 |
| Molecular weight | 611.17 |
| CAS NO. | 10124-56-8 |
| EINECS NO. | 233-343-1 |
| Appearance | White crystals |
| Odor | odorless |
| Density | 2.484g/cm3 |
| Melting point | 628ºC |
| Solubility | solubility in water,insoluble in organic solvents.The aqueous solution is weakly acidic and it hydrolyzes in aqueous solution,particularly under acidic conditions, to sodium trimetaphosphate and sodium orthophosphate. |
| Property | Highly hygroscopic,it can gradually absorb water and become a sticky substance when exposed in the air. |
| Item | Specification | ||
| Special Grade | First Grade | Qualified | |
| Total phosphate(P2O5) %≥ | 68.0 | 67.0 | 65.0 |
| Inactive phosphate(P2O5) % ≤ | 7.5 | 8.0 | 10.0 |
| Iron(Fe) % ≤ | 0.02 | 0.10 | 0.20 |
| PH | 5.8-7.3 | ||
| Water insoluble % ≤ | 0.05 | 0.10 | 0.15 |
| Solubility | Qualified | ||
