Reference FOB Price: | US $290.00 / Ton |
---|---|
Min. Order: | 20 Tons |
CAS No.: | 7681-57-4 |
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Formula: | Na2s2o5 |
EINECS: | 231-673-0 |
Color: | White |
Appearance: | Powder |
Transport Package: | 25kg/Bag |
Property: white or light yellow crystal powder.
Molecular Formula :Na2S2O5
Molecule Weight :190.12
CAS NO .:7681-57-4
Appearance :White Free Flowing Fine Crystal or Powder
Specification For Food Grade and Industry Grade :
Item | Quality Index
| |
Food Grade
| Industry Grade
| |
Purity ( As Na2S2O5) | 98.0% min
| 97.0% min
|
Sulfur Dioxide( SO2) | 65.0% min
| 65.0% min
|
Arsenic ( As ) | 0.0002% max
| -
|
Heavy metals ( As Pb ) | 0.0005% max
| -
|
Selenium (Se ) | 0.0005% max
| -
|
Iron (Fe) | 0.001% max
| 0.002% max
|
Water insoluble | 0.02% max
| 0.05% max
|
PH value : | 4.0-4.8
| 4.0-4.8
|
Remark : | Conformed with FCC V and E 223 Standard
|
Specification for Pharmaceutical Grade and Photo Grade
Item | Quality Index | |
Pharmaceutical Grade
| Photo Grade
| |
Purity ( As Na2S2O5) | 98.0% min
| 98.0% min
|
Sulfur Dioxide( SO2) | 65.0% min
| 65.0% min
|
Thiosulphate ( As S2O3) : | 0.05 % max
| 0.05% max
|
Chloride ( As CL-) : | 30 ppm max
| 50ppm max
|
Arsenic ( As ) : | 1ppm max
| 1ppm max
|
Lead ( Pb ) : | 1 ppm max
| 2ppm max
|
Copper (Cu) : | 1 ppm max
| 1ppm max
|
Iron (Fe ) : | 5 ppm max
| 5ppm max
|
Mercury (Hg) : | 0.1ppm max
| 1ppm max
|
Chromium (Cr) : | 1 ppm max
| -
|
Selenium (Se ) : | 1 ppm max
| 5ppm max
|
Zinc (Zn) | 1 ppm max
| 1ppm max
|
Cadmium (Cd ) | 1ppm max
| -
|
Nickel (Ni) | 1ppm max
| -
|
Na2SO3 + Na2SO4 | 1.5% max
| -
|
PH value : | 4.0-4.8
| 4.0-4.8
|
Remark : | Conformed with USP standard
|
Application:
(1) Food Grade: Bleach agent (e.g. candies, cake, bamboo shoots, etc); Loose agent (e.g. bread, cracker etc); Antiseptic and germicide (e.g. fruit juice, tinned food, brews, the cereals food is defended storage etc); Inhibitor and freshen agent (e.g. day lily, seafood, fruit and vegetable etc).
(2) Industry Grade: Mordant of printing and dyeing; Dechlorinate of textile after bleaching; Sulphonated agent and reducer of chemical industry and pharmacy; Bleach of paper pulp, bamboo and timber bleach of Stap; Treatment agent of waste water; Rubber solidifying agent Perfume industry is served as hydro carbon perfume aldehyde
The hide profession employ to do to molt dose and pliable dose and wearproof dose; sewage treatment, and so on .
(3) Pharmaceutical Grade: In chemical synthesis in the production of acrylic fibre, vitamin K, vitamin A, pharmaceutical intermediates, etc.
(4) Photo Grade: The sensitize industry is served as the developing agent reductant and the protection of fixing bath dose.