Chloride as nacl --- 98.7% Calcium as cacl2 --- 0.29% Magnesium as mgcl2 --- 0.09% Sulphate as na2so4 --- 1.03% Water insoluble matter --- 0.17% Moisture { oven drying at 105 c } --- 0.013% Iron as fe ------ not detected Detection limit ----- iron {fe} >> 0.005 ppm