Ammonium nitrate For porous prill ammonium nitrate Standard : hg3280-1990 Nh4no3 ( dry basis ) : 99.50% min. Free water : 0.3% max. Absorption oil : 7.0% min. Loose density : 0.78g/cm3 Prill size 0.5-2.5mm : 95% min. With anti-caking agent For crystal ammonium nitrate(standard:hg2945-89) Nh4no3 :99.50% min. Residue : 0.05% max Free water : 0.3% max. Packing : 25kgs/bag or 975kgs/bag