Assay(NaOH) ≥ 98.0 %
carbonate (as Na2CO3) ≤ 1.0%
clarity test Qualified
Chloride (CL) ≤ 0.002 %
Sulphate (SO4) ≤ 0.002 %
Total nitrogen (N) ≤ 0.0005 %
Phosphate (PO4) ≤ 0.0005 %
Silicate (SiO3) ≤ 0.005 %
Al ≤ 0.001 %
K ≤ 0.02 %
Ca ≤ 0.002 %
Fe ≤ 0.0005 %
Ni ≤ 0.001 %
Zn ≤ 0.001 %
As ≤ 0.0001 %
Heavy metals (as Pb) ≤ 0.001 %