Fe 63.50% basis (62.5% min) Sio2 3.50% max. Al2o3 3.50% max. P 0.07% max. S 0.06% max. Moisture content (free moisture loss at 105 degrees centigrade) Guaranteed 8.00 % max. (free moisture loss at 105 .C) Physical specification (natural basis): Guaranteed 0-10mm: 90%min +10mm: 10%max -150micron: 30%max Bulk