Al2O3) content,% 30.12 Salt basicity,% 82 Undissolve matter content,% 0.3 PH value 4.1 Ammoniacal nitrogen,% 0.004 As,% less than 0.0001 PB,% less than 0.0006 Cd,% less than 0.0001 Hg,% less than 0.00001 Cr(6+),% less than 0.0001