Waheed, Usman - Hydrochloric Acid

Hydrochloric Acid- HCl

Hydrochloric Acid is a clear, colorless, acid. Like other acid, when dissolved in water, it produces Hydrogen ions. In an aqueous Hydrochloric acid, the H+ joins a water molecule to form a Hydronium ion, otherwise known as H3O+. Hydrochloric Acid, unlike others, is highly corrosive, and is very strong; contributing to many uses. Hydrochloric Acid actually can be used in small applications as well. Although it is poisonous, it can be used to remove stubborn rust stains, cleaning floors, production of some foods, descaling, leather processing and believe it or not, in digestion! This acid actually contributes to the proper digestion, absorption, and utilization of foods, to nourish cells, tissues and organs. However, levels of this actually decreases as we age. Thus, Hydrochloric Acid (HCl) contributes to many worldly applications.

References
1) http://www.epa.gov/ttnatw01/hlthef/hydrochl.html
2) http://worldofchemicalsmedia.blogspot.com/2013/12/interesting-facts-about-hydrochloric.html