| ITEM | Standard | ||
| Al2O3 (m/m):: % / | 30.0 | 29 | 28.0 |
| Water-insoluble (m/m): % ≤ | 0.3 | 0.6 | 1.0 |
| Ammonium Nitrogen: % ≤ | 0.03 | 0.15 | |
| As (m/m): % ≤ | 0.0006 | 0.003 | |
| Pb (m/m): % ≤ | 0.003 | 0.015 | |
| Cd (m/m): % ≤ | 0.0006 | 0.003 | |
| Hg (m/m): % ≤ | 0.00003 | 0.0001 | |
| Cr+6 (m/m): % ≤ | 0.0015 | 0.005 |