Hydrochloric acid or hydrochloric acid (salt ink) is a clear, colorless, and highly odorous solution of hydrogen chloride in water with the chemical formula HCl. It is a highly corrosive and acidic mineral acid with many industrial applications. This acid is widely used because it is one of the basic chemicals.
hydrochloric acid gas is a colorless acid with a tangy flavor, and the air is heavier than the air. This material is easily converted to liquefied and in a damp or solution mode, it converts the blue matter into red.
It was known as salicylic acid, moriatic acid, and salt spirits, and is derived from vitriol (sulfuric acid) and common salt. Free hydrochloric acid was first introduced by Andreas Libavius in the 16th century. After him, chemists such as Johann Rudolf Glaber, Joseph Priestley, and Humphrey Davy used this material in their scientific research.
With the start of mass production in the industrial revolution, hydrochloric acid was used in the chemical industry as a unique reagent in the production of vinyl chloride for PVC plastics and MDI / TDI for the production of polyurethane. It also has many small-scale applications that can be used for housekeeping, gelatin making, descaling, leather making and food additives. Hydrochloric acid is also produced as a by-product of the production of toluene diisocyanate (TDI). About 20 million tons of hydrochloric acid are produced annually in the world.
