Hydrochloric acid (HCl) is the aqueous solution of hydrogen chloride, with the CAS number 7647-01-0. It is a colorless, transparent liquid with a strong, pungent odor and has a high level of corrosivity; Hydrochloric acid can be used in the following products and industries: for the production of chlorides, for refining tin and tantalum from ores, for pickling and cleaning of metal products, for electroplating, for the removal of scale from boilers, for neutralization, as a catalyst and solvent in organic synthesis, for the manufacture of fertilizers and dyes, for the hydrolysis of starch and proteins, for the preparation of various foods, as well as in photography, textiles and Rubber industry.