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Quality Standard HG/T2826-2008
Item |
Chinese standard |
Company standard |
|
HG/T2826-2008 |
|||
Top-grade |
First grade |
||
Main content(以Na2S2O5計),% |
≥96.5 |
≥95.0 |
≥97.0 |
Fe (Fe),% |
≤0.005 |
≤0.010 |
≤0.002 |
Water-Insoluble% |
≤0.05 |
≤0.05 |
≤0.02 |
Arsenic(As) content% |
≤0.0001 |
— |
≤0.0001 |
Molecular Formula: Na2S2O5
Molecular weight:190.10
Appearance:White crystal powder