Item
First Class
Passed
Na2SO4,% ≥
99.0
95.0
Insolubility,% ≤
0.10
1.0
Mg,% ≤
0.30
0.40
Cl,% ≤
0.70
Fe,% ≤
0.010
0.040
Water,% ≤
0.50
2.0
Whiteness,% ≥
--