Sodium metabisulphite extrapure 5KG | |||
11630SR500 | 923730223CX | ||
Extrapure | 9237302 | ||
7681-57-4 | 101050 | ||
Na2S2O5 | March 2024 | ||
190.1 | February 2029 | ||
Sr.No. | Test | Result | Specification |
---|---|---|---|
1 | Description | Fine white crystalline powder. | Fine white crystalline powder. |
2 | Solubility | Complies | Freely soluble in water. Slightly soluble in alcohol. |
3 | Assay(iodometric) | 97.87% | Min. 96.00% |
4 | pH(5% aq soln) | 4.71 | 3.8 - 5.3 |
5 | Chloride(Cl) | Less than 0.05% | 0.05% max |
6 | Thiosulphate(S2O3) | Less than 0.05% | 0.05% max |
7 | Iron(Fe) | 0.0002% | 0.001% max |
8 | Heavy metal(as Pb) | 0.0002% | 0.002% max |
Tested By (Chemist - Quality Control) | Approved By (Head - Quality Control) |