Chemical Formula: H 2 S 2 O 7
Appearance | Clear to off white liquid |
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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 |
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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 |