Hydrochloric Acid is a colorless, highly corrosive, and strong acid that is commonly found in the stomach of humans and other animals. It is also known as muriatic acid when it is used in industrial settings. It is soluble in water and produces hydrogen ions when dissolved, which is the reason for its acidity. The acid is commonly used in various industrial processes, such as in the production of fertilizers, dyes, and pharmaceuticals. Hydrochloric Acid is also used to clean and etch metals and to remove scale and rust from steel.