Anhydrous sodium sulfate
Anhydrous sodium sulfate ( glaubers salt ) standard (GB6009-2003)

Item
Value
 
 
 
 
 
  1
 
2
 
3
 
 
Premium grade
First grade
Premium grade
First grade
Premium grade
First grade
Na2SO4 / % ≥
99.3
99.0
98.0
97.0
95.0
92.0
Water insoluble matter % ≤
0.05
0.05
0.10
0.20
-
-
Ca Nad Mg (as Mg ) % ≤
0.10
0.15
0.30
0.40
0.60
-
Oxide (as Cl ) % ≤
0.12
0.35
0.70
0.90
2.0
-
Fe (as Fe ) % ≤
0.002
0.002
0.010
0.040
-
-
Moisture % ≤
0.10
0.20
0.50
1.0
1.5
-
Whiteness(R457) % ≥
85
82
82
-
-
-
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