STPP : GranularSTPP : Granulated Hydrated Grade 1
Standard specifications for Granulated Hydrated Grade 1 STPP
| Designations | Units | Specifications |
|
Particle size : |
% |
15 maxi 90 mini |
|
Water content |
% | 5 - 9 |
|
(P2O5) content (on dry) |
% | 55.5 ±1 |
|
STPP content (on dry) |
% | 94 mini |
|
Water insoluble materials |
% | 0.1 maxi |
|
pH (1% solution) |
--- | 9 - 10 |
|
Paulte density |
Kg/l | 0.9 – 1.2 |
|
Trace metals : |
ppm |
5 maxi 5 maxi 5 maxi 5 maxi 1 maxi 5 maxi 1 maxi 1 maxi 5 maxi 50 maxi 250 maxi |