Hydrochloric acid is an aqueous solution of hydrogen chloride (HCl), which is a monobasic inorganic strong acid and widely used in industrial applications. The character of hydrochloric acid is a colorless and transparent liquid, which has a strong pungent odor and is highly corrosive. Concentrated hydrochloric acid (mass fraction of about 37%) has a very strong volatility, so the container containing concentrated hydrochloric acid is opened after chlorine

Hydrochloric acid is an aqueous solution of hydrogen chloride (HCl), which is a monobasic strong acid and widely used in industrial applications. The character of hydrochloric acid is a colorless and transparent liquid, which has a strong pungent odor and is highly corrosive. Concentrated hydrochloric acid (mass fraction of about 37%) has a very strong volatility, so the hydrogen chloride gas will volatilize when the container containing concentrated hydrochloric acid is opened, and combine with the water vapor in the air to produce small droplets of hydrochloric acid, so that acid appears above the mouth of the bottle. fog. Hydrochloric acid is the main component of gastric acid, which promotes digestion of food and protects against microbial infections.