Hydrochloric acid is a clear, colourless, solution of hydrochloric acid (HCl) in water.
Its uses are numerous. Since the Industrial Revolution, HCl has gained importance particularly in large-scale production of vinyl chloride for PVC.
- Major uses of HCl include:
- Pickling of steel (surface removal of oxide and scale)
- Chemical manufacturing
- Oil-field acidizing
- pH control
- Regeneration of ion exchangers
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