Boric Acid (H3BO3) Chemical Analysis Component Unit Content B2O3 % 56.25min Purity % 99.90min SO4 ppm 500max Cl ppm 10max Fe ppm 7max. Size Distribution Size Unit Content +1.000 % 2.00max -1.063 % 4.00max. 50kg/bag 24Mton/20'FCL load without palletized 50kg/bag 24Mton/40'FCL load without palletized.