Sodium bisulfite AR Grade is an inorganic compound that can only exist in solution, and the solid is unstable at room temperature. CAS 7631-90-5 EC 231-548-3

| Product Name       | Sodium Bisulfite           |
| Specification      | Analytical Grade           |
| Batch Number       | 2023052401                 |
| Molecular Formula  | NaHSO3                     |
| Molecular Weight   | 104.06                     |
| Batch Size         | 2000kg                     |
| Testing Unit       | Production Department     |
| Sample Category    | Inorganic                  |
| Report Date        | May 26, 2023               |
| Testing Standard   | HG/T3492-2003              |

| Test Item          | Standard Requirement      | Test Result     |
|--------------------|---------------------------|-----------------|
| Content (as SO2), %| ≥58.5                     | 65.1            |
| Appearance         | White crystalline powder  | White crystalline powder |
| Clarity Test       | Pass                      | Pass            |
| Insoluble Residue, %| ≤0.005                   | 0.002           |
| Chloride (Cl), %   | ≤0.01                     | ＜0.01           |
| Iron (Fe), %       | ≤0.001                    | ＜0.001          |
| Arsenic (As), %    | ≤0.0001                   | ＜0.0001         |
| Heavy Metals (as Pb), %| ≤0.001                | ＜0.001          |

Analysis Conclusion:
Meets the requirements of HG/T3492-2003 for analytical grade.