
Chemical Formula: H 2 S 2 O 7
| Appearance | Clear to off white liquid |
|---|---|
| Sp Gravity at 30 0 C: | 1.916 at 4C (39 F) |
| Boiling point | 140 0 C (284 F) at 760 mm Hg |
Attacks many metals with liberation of hydrogen, which is inflammable and forms explosive mixture, Hygroscopic in nature, oxidizing agent.
| Sulphuric Acid | 104.50% min |
|---|---|
| Free SO 3 | 23.0% min |
| Iron (as Fe) | 0.05% max |
| Residue on ignition | 0.02% max |
| Sulphur dioxide (as SO 2 ) | 0.02% max |
| Chloride (as Cl): | 0.02% max |
| Arsenic (as As) | Less than 1 ppm |
| Copper (as Cu) | Less than 1 ppm |
| Lead (as Pb) | Less than 3 ppm |
| Mercury (as Hg) | Less than 0.5 ppm |
| Cadmium (as Cd) | Less than 1 ppm |
| Turbidity | Less than 50 ntu |