Moisture per cent by weight, maximum      0.5

Water soluble potash (as K2O)per cent by weight, minimum 60.0

Sodium(as NaCl) per cent by weight, maximum     3.5

Magnesium (as MgCl) per cent by weight, maximum    1.0

Particle size – 90 per cent of the material shall pass thru 3.35 mm IS sieve and be retained on 1 mm IS sieve. Not more than 5 per cent shall be below 1 mm IS sieve.