Anhydrous Sodium Sulfite
CAS NO.：7757-83-7
Molecular Formula: Na2SO3
Structural Formula: 126.04
Structural formula: .png)
Appearance：White crystal or powder
Use：Medicinal excipients, Antioxidants.
Packing：25kg/Drum
Specification Standard：Pharmacopoeia of the people's Republic of China, 2020 Edition (Volume 4)
| Item | Index |
| Appearance | White crystal or powder |
| Assay | 97.0%～100.5% |
| Ferric salt | ≤10ppm |
| Zinc | ≤25ppm |
| Heavy metals | ≤10ppm |
| Selenium | ≤10ppm |
| Arsenic | ≤4ppm |