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Sodium Hydrosulfite Na2S2O4 Sodium Hydrosulfite
Molecular formula:Na2S2O4
Molecular weight:174
CAS Number 7775-14-6
H.S code 28311010
UN number 1384
Class 4.2
2.SPEFICICATION:
|
Index |
Technical Grade
HG/T 2074-2011 |
Food Additive
GB 22215-2008 |
||
|
Na2S2O4, |
≥ 90% |
≥ 88% |
≥ 85% |
≥ 88% |
|
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 |
≤ 1ppm |
≤ 1ppm |
≤ 1ppm |
|
Formate (As HCHO), |
/ |
/ |
/ |
≤ 0.05% |
|
water insolubles, |
≤ 0.05% |
≤ 0.05% |
≤ 0.05% |
/ |
|
Cadmium (Cd) |
/ |
/ |
/ |
≤ 2ppm |
|
Plumbum (Pb) |
/ |
/ |
/ |
≤ 5ppm |
3. Characters of Sodium hydrosulfite:
It is a versatile chemical that's used in the manufacture of a variety of products we all use every day,
from photographic film to wine; from fine writing papers to leather goods; from colored fabrics to metal recovery.
While the applications for this chemical workhorse are as vast and as varied as the industries that use it,
in most cases, sodium hydrosulfite performs one of the following three roles:
1) As reducing agent, hydrosulfite chemically reduces othercomponents by donating an electron or electrons
2) As sulfonating agent, hydrosulfite adds sulfur to another chemical compound
3) As cation source, hydrosulfite adds a cation, or sodium, to a product system
4. Application Field of Sodium Hydrosulfite:
Textiles; Pulp and paper; Clay; Leather; Foods and beverages; Polymers; Photographics; Chemical processing;
Cleaners; Water treatment; Gas purification; Environmental improvement
5. Packing of Sodium Hydrosulfite:
25kg pp bag, 50kg/100kg net in iron drums with double PVC bags
