| Appearance: | Colorless and free from suspended matter or sediment |
| Assay (as NH3): | 28.0-30.0% |
| MAXIMUM ALLOWABLE | |
| Residue after ignition: | 0.002% |
| Carbon dioxide (CO2): | 0.002% |
| Chloride (Cl): | 0.5 ppm |
| Phosphate (PO4): | 2 ppm |
| Nitrate (NO3): | 2 ppm |
| Sulfate (SO4): | 2 ppm |
| Heavy metals (as Pb): | 0.5 ppm |
| Iron (Fe): | 0.2 ppm |
| Substances reducing permanganate: | Passes test |