Sodium Metabisulfite

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