Product Description
Sodium metabisulfite
Property: White or light yellow crystal powder, a strong smell of sulfur dioxide, relative density is 1.4, easy to dissolve in water and glycerin, water solution. It has acidity, and its solubility will become large while raising the temperature and is less to dissolve in ethanol.
Molecular Formula: Na2S2O5
Molecule Weight: 190.12
CAS No.: 7681-57-4
Appearance: White Free Flowing Fine Crystal or Powder
Packing: Packed in 25kg plastic woven bag or as per the buyer's requirement.
Specification For Food Grade and Industry Grade:
Item Quality Index
Food Grade Industry Grade
Purity ( As Na2S2O5) 98.0% min 96.0% min
Sulfur Dioxide( SO2) 65.0% min 65.0% min
Arsenic ( As ) 0.0002% max -
Heavy metals ( As Pb ) 0.0005% max -
Selenium (Se ) 0.0005% max -
Iron (Fe) 0.001% max 0.002% max
Water insoluble 0.02% max 0.05% max
pH value: 4.0-4.8 4.0-4.8