Certificate of Analysis
Product Name
SODIUM THIOSULPHATE 97% AR (anhydrous)
CAS Number
7772-98-7
Molecular Formula
Na2S2O3
Catalogue No.
AL1429C
Molecular Weight
158.18 g/mol
Batch Number
AL-2026-AL1429C
Manufacturing Date
September-2026
Expire Date
September-2031
| Type of Test | Standard | Observed |
|---|---|---|
| Description | Colorless Crystalline powder | Colorless Crystalline powder |
| Assay | 97% | 97.46% |
| Acidity (As H2SO4) | <0.005% | NIL |
| Alkalinity (as NaOH) | <0.004% | 0.003% |
| Calcium (Ca) | <0.01% | <0.01% |
| Heavy metals (as Pb) | <0.001% | <0.001% |
| Insoluble matter | <0.01% | 0.008% |
| Loss on drying at 105°C | <1.0% | 0.09% |
| Sulphate & sulphite (as SO4) | <0.5% | 0.22% |
| Sulphide (S) | <0.0001% | <0.0001% |
Tested By
Hitesh Kunjathur
Analysed By
Preeti Rane
