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| Pallets Packing | 20'FCL | 40'FCL | ||
| With | Without | With | Without | |
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25KG/Woven Bag
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500KG/Jumbo Bag
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| Pallets Packing | 20'FCL | 40'FCL | ||
| With | Without | With | Without | |
| 25KG/Woven Bag | -- | -- | -- | -- |
| 500KG/Jumbo Bag | -- | -- | -- | -- |
| 1000KG/Jumbo Bag | -- | -- | -- | -- |
| 25KG/Paper Bag | -- | -- | -- | -- |
Property: White or yellowish crystalline powder, with strong SO2 smell, relative density of 1.4, easily soluble in water and glycerol, acidic aqueous solution, solubility increases with the increase of temperature, slightly soluble in ethanol. It is easy to oxidize and deteriorate in the exposed air, and continuously release SO2, and finally turn the product into sodium sulfate. Therefore, this product should not be stored for a long time. It will decompose when heated to 150 ℃.
Molecular Formula :Na2S2O5
Molecule Weight :190.12
CAS NO .:7681-57-4
Appearance :White Free Flowing Fine Crystal or Powder
Packing:Packed in 25kg plastic woven bag, 25kg Kraft paper bag, 25kg PE bag, 500kg/1000kg/1100kg/1200kg jumbo bag or as per the buyer's requirement.
Specification For Food Grade and Industry Grade :
Item | Food Grade | Industry Grade | |
Purity(As Na2S2O5) | ≥98.0% | ≥97.0% | ≥96.0% |
Sulfur Dioxide(SO2) | ≥65.0% | ≥65.0% | ≥65.0% |
Arsenic(As) | ≤0.0002% | -- | ≤0.0001% |
Heavy Metals(As Pb) | ≤0.0005% | -- | -- |
Selenium(Se) | ≤0.0005% | -- | -- |
Iron(Fe) | ≤0.002% | ≤0.005% | ≤0.005% |
Water Insoluble | ≤0.02% | ≤0.05% | ≤0.05% |
PH Value | 4.0-4.8 | 4.0-4.8 | 4.0-4.8 |
Remark | Conformed with FCCV and E223 Standard | ||
Specification for Pharmaceutical Grade and Photo Grade
Item | Pharmaceutical Grade | Photo Grade |
PURITY(AS Na2S2O5 ) | ≥96.0% | ≥96.5% |
SULFUR DIOXIDE(SO2) | ≥65.0% | ≥65.0% |
CHLORIDE(As NaCL) | ≤0.003% | ≤0.005% |
ARSENIC(As) | ≤0.0001% | ≤0.0001% |
HEAVY METALS(As Pb) | ≤0.0005% | ≤0.0008% |
SELENIUM(Se) | ≤0.0001% | ≤0.0005% |
IRON(Fe) | ≤0.001% | ≤0.001% |
Copper(Cu) | ≤0.0001% | ≤0.0001% |
Nickel(Ni) | ≤0.0001% | -- |
WATER INSOLUBLE | ≤0.01% | ≤0.01% |
PH VALUE: | 4.0-4.8 | 4.0-4.8 |
Manufacturing
