Product Feature
Sodium Metabisulphite is a white to slightly yellowish crystalline powder with sulfur dioxide odor; Readily soluble in water.
 

Product Specification/Models

1. TECH GRADE
APPEARANCE: White to slightly yellowish crystalline powder
CONTENT: 98.0% min
SO2: 65.0% min
Na2S2O4: 2.0% max
INSOLUBLES IN WATER: 0.05% max
PARTICLE SIZE: 85% (mesh 200)
pH: 4 -4.6
Fe: 5ppm max

2. FOOD GRADE
APPEARANCE: White to slightly yellowish crystalline powder
CONTENT: 98.0% min
SO2: 65.0% min
Na2S2O4: 2.0% max
INSOLUBLES IN WATER: 0.05% max
PARTICLE SIZE: 85% (mesh 200)
HEAVY METALS: 10ppm max
As 1ppm max
Fe: 5ppm max
pH: 4.5 - 5.5
 

Other Information
CAS No. 7681-57-4
FORMULA: Na2S2O5