| Parameter | Unit | Technical Grade | Food Grade |
| Na2S2O3 | gr/100gr | 96.0 | 97.5 |
| SO2 | gr/100gr | 64 | 66 |
| S2O3-2 | gr/100gr | – | 0.025 |
| PH (10 %) | – | 4.0 – 4.8 | 4.0 – 4.8 |
| Chloride | mg/kg | – | 50 |
| Pb | mg / kg | 10 > | 10 > |
| Pb (Cd,Cu,Cr,Pb,Zn) | mg / kg | – | < 2 (each) |
| Iron | mg / kg | 10 < | 10 > |
| Insoluble Matter | gr/100gr | – | 0.05 |
