monoclinic crystal,used in fixers, plating, leather, reductant
1, Chemical name: Sodium thiosulfate 2, Structural formula:3, Molecular formula: Na2S2O2·5H2O4, Molecular weight: 248.175, Properties: monoclinic crystal, Melting point : 40-45, Relative density :1.729(17). 6, Quality standard:
| Item | Photo grade | Tech grade | Anhydrous grade |
| Appearance | colorless transparent crystal | colorless transparent crystal | white powder |
| Assay | ≥99.00% | ≥98.5% | ≥98.0% |
| Water Insoluble matter | ≤0.01% | ≤0.03% | ≤0.03% |
| Sulfide | ≤0.001% | ≤0.003% | ≤0.001% |
| Fe | ≤0.001% | ≤0.003% | ≤0.001% |
| PH value | 6.5-9.5 | 6.5-9.5 | 6.5-9.5 |
| Granularity | 12-16 | -- | -- |
7, Packing:25kg, 50kg plastic woven bag, or following your demand. 8, Uses: used in fixers, plating, leather, reductant, dechlorinating agent, sulfur dyeing agent, as a blush preventive agent, and as a disinfectant. and decolor agent
Sodium Thiosulfate
