Total alkali content	99.2%min
Chlorides (NaCl)	0.5%max
Sulphate ( SO4)	0.03%max
Iron (Fe2O3)	0.0035%max
Water insoluble matter	0.03%max
Ignition loss	0.80%max
Bulk density	0.9g/ml min
Particle size 180um sieve remaining	70%min