Hydrochloric acid (gas)

Hydrochloric acid gas, also known as hydrogen chloride gas, is a colorless, pungent, and corrosive substance composed of hydrogen and chlorine. When it dissolves in water, it forms hydrochloric acid, a strong acid used in industry, cleaning, and laboratory processes. As a gas, it can irritate the respiratory system and mucous membranes, so it must be handled with proper safety precautions. It plays a vital role in pH regulation, metal cleaning, and manufacturing, but its reactive nature requires careful management to prevent health and environmental hazards.