Hydrochloric acid, solution is a colorless watery liquid with a sharp, irritating odor. HCL, or Hydrochloric acid, Consist of hydrogen chloride, a gas, dissolved in water. Sinks and mixes with water. Produces irritating vapor. At room temperature, hydrogen chloride is a colorless to slightly yellow, corrosive, nonflammable gas that is heavier than air and has a strong irritating odor. On exposure to air, hydrogen chloride forms dense white corrosive vapors.
HCL has many uses in industry such as : manufacture of organic and inorganic compounds, removing metal stains, cleaning pools, etc.