Grade Standard: | Industrial Grade |
---|---|
Water Insoluble: | 0.03-0.4% |
Fe: | 10, 20, 30, 50, 80, 150, 1500ppm |
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ITEM
|
STANDARD I
|
STANDARD II
|
STANDARD III
|
STANDARD IV
|
STANDARD V
|
Fe
|
10ppm max
|
30ppm max
|
50ppm max
|
150ppm max
|
1500ppm max
|
Na2S
|
60%min
|
60%min
|
60%min
|
60%min
|
60%min
|
Water Insolubles
|
0.03%max.
|
0.18%max.
|
0.18%max.
|
0.30%max.
|
0.40%max.
|
Na2CO3
|
1.80%max.
|
1.80%max.
|
1.80%max.
|
3.00%max.
|
5.00%max.
|
Na2SO3
|
1.00%max
|
1.80%max.
|
2.00%max.
|
2.00%max.
|
2.00%max.
|
Na2S2O3
|
2.00%max
|
2.00%max
|
2.00%max
|
2.00%max
|
2.00%max
|
Colour
|
Yellow
|
Red
|