Sodium Sulfite Anhydrous (7757-83-7)
Basic Information
Chemical Name: Sodium Sulfite Anhydrous
Chinese Aliases: Sodium Sulfite (Anhydrous); Dry Sodium Sulfite
English Name: Sodium Sulfite Anhydrous
Molecular Formula: Na₂SO₃
Molecular Weight: 126.04
CAS Number: 7757-83-7
EINECS Number: 231-821-4
Appearance: White crystalline powder or granules, easily soluble in water, insoluble in ethanol
Technical Specifications
Item | Indicator | Premium | First Grade | Qualified
Sodium Sulfite (Na₂SO₃) w/% | ≥ | 97.0 | 93.0 | 90.0
Iron (Fe) r w/% | ≤ | 0.003 | 0.005 | 0.02
Water-insoluble matter w/% | ≤ | 0.02 | 0.03 | 0.05
Free alkali (as Na₂CO₃) w/% | ≤ | 0.10 | 0.40 | 0.80
Sulfates (as Na₂SO₄) w/% | ≤ | 2.5 | / | /
Chlorides (as NaCl) w/% | ≤ | 0.10 | / | /
(The above parameters are for reference only; please refer to the factory test certificate for specifics.)
Packaging Specifications
The standard packaging is 25kg woven bag lined with polyethylene bag, and ton bags or smaller packages can also be provided according to customer requirements.