(1)Fe:30ppm max
(2)Thin yellow flakes,soluble in water
(3)Presenting strong alkaline solution
Specification:
(2)Thin yellow flakes,soluble in water
(3)Presenting strong alkaline solution
Specification:
|
Fe
|
Na2S
|
Water insoluble
|
Na2CO3
|
Na2SO3
|
Na2S2O3
|
color
|
|
15ppm Max
|
60%min.
|
0.05%max
|
1.80%max
|
1.80%Max
|
2.00%max.
|
Yellow
|
|
20ppm Max
|
60%min.
|
0.10%max
|
1.80%max
|
1.80%Max
|
2.00%max.
|
|
|
30ppm Max
|
60%min.
|
0.18%max
|
1.80%max
|
1.80%max
|
2.00%max.
|
|
|
50ppm Max
|
60%min
|
0.18%max
|
1.80%max
|
2.00%max
|
2.00%max
|
|
|
80ppm Max
|
60%min
|
0.20%max
|
2.00%max
|
2.00%max
|
2.00%max
|
|
|
150ppm Max
|
60%min
|
0.30%max
|
3.00%max
|
2.00%max
|
2.00%max
|
|
|
1500ppm Max
|
60%min
|
0.40%max
|
5.00%max
|
2.00%max
|
2.00%max
|
Red
|
Uses: Used as making sulphur dyestuff intermediate reducer, mordant, flotation agent, depilatory for leather, digestion auxiliary in paper-making also widely used in pigment and rubber industry, etc.