Sodium thiosulfate pentahydrate A.G. 1000 g (27440-31000)
Chemical formula: Na₂S₂O₃ ∙ 5H₂O
Molar mass: 248.18 g/mol
CAS: 10102-17-7
EINECS: 231-867-5
Specification
| Appearance | colourless crystals |
| Assay | min. 99,0 % |
| pH (5% water solution) | 6,0 - 8,5 |
| Chloride (Cl⁻) | max. 0,02 % |
| SO₄²⁻ + SO₃²⁻ (as SO₄²⁻) | max. 0,2 % |
| Fe (Iron) | max. 0,005 % |
| Heavy metals (as Pb) | max. 0,005 % |