Machong Town, Dongguan City , Guangdong , China
86-769-88232198, 88828369, 88822410, 86-769-88838576, 88226867, 86-769-88825425
Sodium Hydrosulfite (powder type）
Chemical Formula：Na2S2O4
CAS No.:7775-14-6
Appearance:Free-flowing white crystalline powder
Odor:Odorless or with a slight odor of sulfur dioxide
Pacgage:15kg,20kg,25kg,50kg,100kg,200kg iron drums with double polyethylene
liners;500kg,1200kg,1800kg intermediate bluk container(IBC)
Product Specification :
| . | Technical Grade | Food Grade | ||
90%Grade | 88%Grade | 85%Grade | ||
Na2S2O4 | 90% | 88% | 85% | 85% |
Iron（Fe） | 20ppm | 20ppm | 20ppm | 20ppm |
zinc（Zn） | 1ppm | 1ppm | 1ppm | 1ppm |
solution appearance | clear | clear | clear | clear |
EDTA | / | / | / | qualified |
Arsenic（As） | / | / | / | 1ppm |
other heavy metal（as Pb） | / | / | / | 1ppm |
Formate | / | / | / | 0.05% |
water insolubles | 0.05% | 0.05% | 0.05% | / |
| shelf life（months） | 12 | 12 | 12 | 12 |
Typical Analysis Results
Technical Grade | Food Grade | |||
90%Grade | 88%Grade | 85%Grade | ||
Na2S2O4 | 90.89% | 89.0% | 86.51% | 86.94% |
Na2S2O5 | 6.59% | 6.68% | 6.89% | 6.57% |
Na2CO3 | 1.69% | 3.3% | 5.7% | 5.59% |
Na2S2O3 | 0.17% | 0.19% | 0.42% | 0.39% |
Na2SO3 | 0.21% | 0.20% | 0.38% | 0.35% |
Iron(Fe) | 15ppm | 13ppm | 18ppm | 11ppm |
zinc(Zn) | / | / | / | 0.13ppm |
solution appearance | / | / | / | clear |
EDTA | / | / | / | qualified |
As | / | / | / | 0.28ppm |
other heavy metal（as Pb） | / | / | / | 0.24ppm |
HCHO | / | / | / | 0.03ppm |
water insolubles | 0.004% | 0.007% | 0.006% | / |
In addition to powder sodium hydrosulfite,we can also supply fine quality solution sodium hydrosulfite to end-users in pulp & paper,textile and kaolin clay industries by dissolving the powder hydro.
Characteristics of our solution sodium hydrosulfite:
higher solution strength (Na2S2O4:around 165g/L) than other solution type sodium hydrosulfite.
can be transported and stored under normal temperature(5-25℃)without needing refrigeration.
Applica： It is widely used in the textile industry for vat dyeing
,reduction cleaning ,printing and stripping ,textile
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