|
Sodium metabisulfite(High pure Grade) 
Molecular Formula: Na2S2O5
Molecular Weight: 190.10 CAS NO:7681-57-4
Appearance: white or light yellow crystalline
powder
Character: with smell of SO2,soluble
in water,the solution is acidic.
Usages: Fiber, photo ,pharmacy,chemical
,petroleum chemical and so on.
Packing: 25kg PE bag or 1000kg/bag Product
specifications:
| Items |
Index |
|
standard |
Reference value |
| Na2S2O5
≥% |
97.5 |
97.9 |
| Fe ≤ % |
0.0005 |
0.0003 |
| Insoluble in water ≤ % |
0.005 |
0.002 |
| Cl ≤ % |
0.005 |
0.0005 |
| Sodium thiosulfate≤ % |
0.05 |
0.02 |
| Pb≤ % |
0.0005 |
0.0001 |
| As ≤ % |
0.0001 |
0.00002 |
|
