Appearance : pure white loose powder
         Content : ≥98.5%
       Moisture : ≤0.25%
         O-PDA : ≤0.20%
Acidity (H2SO4) : ≤0.20%
       Fineness : 360~400 mesh
             DAP : ≤3ppm
             HAP : ≤0.5ppm
        Packing : 25kg net paper or woven bag