Product name：Sodium hydrosulfite
Quality standard：HG/2074-2004 JISK1476-1995
Molecular formula：Na2S2O4
Appearance：white free fluid crystal powder
Flavor：no smell or with sulfur dioxide flavor
Packing:iron metal with airproof package lined with double layer palstic bag. Net weight is 50kg
Use：
1. Widely used in textile industry, and used as dye reduce for reducing dyes, reduction bleaching agent and other.
2. Widely used in paper making industry, and used as bleaching agent.
3. Used as bleaching agent, and widely used for bleaching kaolin, fur and others.
4. Used for synthesis for sulfocarbamide, sulfide and others.
5. Used as reducer in chemical industry.
6. Food additive grade is mainly used in food industry and widely used in confection, dry fruit, sugar and others .
Product specifications：
INDEX |
90% |
88% |
85% |
FOOD ADDITIVE |
Na2S2O4 |
≥90% |
≥88% |
≥85% |
≥85% |
Fe |
≤20ppm |
≤20ppm |
≤20ppm |
≤20ppm |
Zinc（Zn） |
≤1ppm |
≤1ppm |
≤1ppm |
≤1ppm |
Other heavy metal
（calculated as Pb） |
≤1ppm |
≤1ppm |
≤1ppm |
≤1ppm |
Water Insolubles |
≤0.05% |
≤0.05% |
≤0.05% |
≤0.05% |
Shelf Life(month) |
12 |
12 |
12 |
12 |
rongalite analysisi report:
ITEM
|
90%
|
88%
|
85%
|
FOOD ADDITIVE |
|
Na2S2O4 |
91.00%
|
89.50%
|
86.60% |
86.96%
|
|
Na2S2O5
|
6.39% |
6.64%
|
6.82%
|
6.54% |
|
Na2CO3
|
1.10%
|
2.50%
|
5.70%
|
5.58%
|
|
Na2S2O3
|
0.18%
|
0.20%
|
0.41%
|
0.38%
|
|
Na2SO3
|
0.22%
|
0.21%
|
0.32%
|
0.36%
|
|
Fe |
14ppm
|
15ppm
|
16ppm
|
11ppm
|
|
Water Insolubles |
0.05% |
0.04% |
0.04% |
0.01% |
|
