Sodium Metabisulphite Tech Grade & Food Grade
Formula:Na2S2O5
Appearance:White crystalline powder
Tech Grade Standard: HG/T2826-2008| Item | National Standard | Our Standard | |
| HG/T2826-2008 | |||
| Superior Class | First Class | ||
| Purity(as Na2S2O5) % | ≥96.5 | ≥95.0 | ≥97.0 |
| Fe % | ≤0.005 | ≤0.010 | ≤0.002 |
| Water Insoluble % | ≤0.05 | ≤0.05 | ≤0.02 |
| As % | ≤0.0001 | — | ≤0.0001 |
Food Grade Standard:GB1893-2008
| 项目 | National Standard | Our Standard |
| GB1893-2008 | ||
| Purity (as Na2S2O5) % | ≥96.5 | ≥97.0 |
| Fe % | ≤0.003 | ≤0.0015 |
| Clarity | Clarify | Clarify |
| Heavy Metal as Pb % | ≤0.0005 | ≤0.0002 |
| As % | ≤0.0001 | ≤0.0001 |