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Detailed spec listed as below:
Item | Value | Unit | Index |
Purity | 97.2 | g/100g | min |
So2 | 56.0 | g/100g | min |
K2S2O3 | 0.1 | g/100g | max |
Na | 2 | g/100g | max |
Cl | 0.5 | g/kg | max |
pH (10% solution ) | 3.8-4.8 | - | |
Heavy metals(as Pb) | 10 | mg/kg | max |
As | 1 | mg/kg | max |
Cu | 1 | mg/kg | max |
Fe | 5 | mg/kg | max |
Hg | 0.1 | mg/kg | max |
Pb | 1 | mg/kg | max |
Se | 1 | mg/kg | max |
Zn | 1 | mg/kg | max |
Application:
Used in bleaching agent, antiseptic, antioxidant, the preservation of wine, beer, fruit juice, vegetable, meat and grape, or used in the photo chemicals. It also can be used in cyanideless electroplating of silver.
Potassium Metabisulfite