Character & Purpose: White or buff crystal powder. Mainly used in
printing and dyeing, medicine, tanning, etc.
Packing: 25 Kg PP/PE BAG
Formula: Na2S2O5
Standard:
|
Item |
Spec. |
Typical Results |
|
Na2S2O5/% |
96 Min. |
97.68 |
|
Sodium Metabisulphite(as SO2)/% |
65 Min. |
65.81 |
|
Iron Content/% |
0.005 Max. |
0.003 |
|
Water-insoluble/% |
0.05 Max. |
0.039 |
|
PH Value |
4.0-4.6 |
4.5 |
|
Heavy Metal(as Pb)/% |
0.001 Max |
PASS |
|
As/% |
0.0002 Max |
PASS | |
