Muriatic acid is another name for hydrochloric acid.  

    Compound name: Hydrogen Chloride

    Formula: HCl

    Molar mass: 36.461 g/mol

    Melting point: -114.22 °C or -1730.60 °F

    Boiling point: -85.05 °C or -121.09 °F

   

Where is it found?
     Global sources of hydrogen chloride are credited to natural events. Some of the natural events, which are sources of hydrogen chloride are reactions in the atmosphere with ocean sea salts and volcanic eruptions. A small amount of hydrogen chloride comes from forest fires and weathering rocks and dust. 

How is it obtained?
    Hydrogen chloride can also be produced as a by-product of the reaction of chlorine with hydrocarbons which produce organic chlorides.  The main manmade sources of gaseous hydrogen chloride in the U.S. comes from the combustion of fuels, burning of trash, smelting of metal scraps, and the manufacture of aluminum, plywood, and particle board. Humans release less than 4 million tons of hydrogen chloride and chloride. 22% of the 4 million tons is contributed by U.S. industry. To make hydrochloric acid, there are three main processes. First, hydrogen chloride is obtained from the by-product in the chlorination of hydrocarbons. In the second process, sulfuric acid and salt are heated to form hydrogen chloride, and in the third method hydrogen chloride is produced by the combustion of hydrogen in chlorine.

Natural Abundance

    Oceans account for the largest global source of chloride emission, which includes hydrogen chloride to the atmosphere. Oceans release about 77 million to 660 million tons each year. Smaller amounts of hydrogen chloride come from forest fires, weathering dust and rocks.