| Specification | (GB/T 1292-2008 ) | ||
| Content(CH 3 COONH 4 ), w/% ≥ | 98.0 | 98.0 | 97.0 |
| PH value(50g/L,25ºC) | 6.7-7.3 | 6.5-7.5 | 6.5-7.5 |
| Clarity Test/No ≤ | 2 | 3 | 5 |
| Insoluble Substances, w/% ≤ | 0.002 | 0.005 | 0.01 |
| Ignition Residue, w/% ≤ | 0.005 | 0.005 | 0.01 |
| Moisture(H 2 O), w/% ≤ | 2 | --- | --- |
| Chlorides (Cl), w/% ≤ | 0.0005 | 0.0005 | 0.001 |
| Sulfates(SO 4 ), w/% ≤ | 0.001 | 0.002 | 0.005 |
| Nitrates(NO 3 ), w/% ≤ | 0.001 | 0.001 | --- |
| Phosphates (PO 4 ), w/% ≤ | 0.0003 | 0.0005 | --- |
| Magnesium (Mg), w/% ≤ | 0.0002 | 0.0004 | 0.001 |
| Calcium(Ca), w/% ≤ | 0.0005 | 0.001 | 0.002 |
| Iron (Fe), w/% ≤ | 0.0002 | 0.0005 | 0.001 |
| Heavy metal (Pb), w/% ≤ | 0.0002 | 0.0005 | 0.001 |
| Reduction of Potassium Permanganate, w/% ≤ | 0.0016 | 0.0032 | 0.0032 |