We offer hydrochloric acid. Hydrochloric acid is a clear, colourless, highly pungent solution of hydrogen chloride (hcl) in water. It is a highly corrosive, strong mineral acid with many industrial applications. uses: it is basically used in water treatment, dyes, metal pickling, leather industry, petroleum refinery, latex coagulation, galvanising, brewery, sugar refining, phosgene, floor cleaning. specifications: total acidity as hcl, per cent by mass: min.