| Item | Quality Index | |
| Dense | Light | |
| Total alkali( As Na2CO3 ) | 99.2% min | 99.2 % min | 
| Sulphate ( As SO4) | 0.03 % max | 0.03% max | 
| Chlorides ( As NaCL) | 0.7% max | 0.7 % max | 
| Iron ( As Fe2O3 ) | 0.004% max | 0.004% max | 
| Water insoluble | 0.04% max | 0.04% max | 
| Ignition loss | 0.80% max | 0.80% max | 
| Bulk density | 0.9 g/ml min | 0.65 g/ml min | 
