| Termini | Standard |
| NH4Cl %: | 99-99.5 % min |
| H2O %: | 0.5-1.0% max |
| % residui di accensione: | 0.4% max |
| Fe% | 0.0007-0.003% max |
| PB% | 0.0005-0.001% max |
| SO4 %: | 0.02-0.05% max |