| Ash content | < 50 ppm |
| H 2SO 4 | Min 98% |
| Appearance | clear |
| Color | < 40 Hazen (typically 25) |
| Hg (Premium) | <0.1 ppm (typically 0.05 ppm) |
| Hg (Standard) | <0.5 ppm (typically 0.25 ppm) |
| Fe | <25 ppm (typically <15 ppm) |
| Ni | <1 ppm |
| Cr | <1.5 ppm |
| Mn | <0.3 ppm |
| SO 2 | <30 ppm |
| Cl | <2 ppm |
| F – (Premium) | <2 ppm (typically 1 ppm) |
| F – (Standard) | <5 ppm |
| Nx Oy expressed as N | <5 ppm |
| As | <0.2 ppm (typically 0.1 ppm) |
| Cd | <0.02 ppm |
| Pb | 0.3 ppm |
Applications
– Sulphuric acid finds its applications as a dehydrating agent, a catalyst and an active reactant in chemical processes as a solvent and an absorbent.
– It is also used in process industries in very dilute concentrations for ph control of saline solutions in strong fuming acids used in the dye intermediate, explosives and pharmaceutical industries.
– Sulphuric acid use in steel, heavy chemicals and fertilizer industry, particularly superphosphate and ammonium sulphate industries.
– Sulphuric acid after its initial use in some phases of the explosive, petroleum and dye-intermediate industries is recovered in a form often unsuitable for use in the same process, but of a strength and grade entirely suitable for use in other industries.
– Used in cooling water treatment as on alkalinity reducer.