Property: White or light-yellow crystalline powder, smell of SO2. No other smell when dried. Specific gravity is 1.4. It’s soluble in glycerine, It’s soluble slightly in alcohol.
Specification:
Sodium Metabisulfite | 97% Min |
Iron(Fe) | 0.003% Max |
Insoluble matter in water | 0.05% Max |
PH | 4.0-4.6 |
Heavy metal(as Pb) | 0.002% max |
Arsenic(As) | 0.0002% max |
