Industrial Grade Sodium Metabisulfite
Quality Standard HG/T2826-2008
|
Item |
Chinese standard |
Company standard |
|
|
HG/T2826-2008 |
|||
|
Top-grade |
First grade |
||
|
Main content(以Na2S2O5计),% |
≥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
