content%                         ≥90.0              ≥85.0
chloride(Cl-)%               ≤0.003           ≤ 0.005
sulphate(SO42-)%        ≤ 0.001         ≤ 0.002
IRON(Fe3+)%                ≤ 0.0001       ≤ 0.0005
Residue%                      ≤ 0.006          ≤ 0.020