| Item | STANDARD |
| Zn | 21% min |
| As | 10ppm Max |
| Cd | 10ppm Max |
| Pb | 15ppm Max |
| Hg | 5ppm Max |
| Fe | 100ppm Max |
| Insoluble matter in water | 0.05% Max |
| Appearance | White & Free Flowing Crystal, None Caking Material. |
| Granular | Zn: 21% min. Pb/As/Cd: 10 ppm max, Size: 2-4 mm or 1-3 mm |