Hydrochloric acid is a colorless liquid. It should be noted that industrial hydrochloric acid will be slightly yellow due to the presence of impurities such as ferric iron salts. Hydrochloric acid is an aqueous solution of hydrogen chloride with a pungent odor. Generally, the hydrochloric acid used in laboratories is 0.1mol/L, pH=1. Because concentrated hydrochloric acid is volatile, the volatile hydrogen chloride gas reacts with water vapor in the air to form small droplets of hydrochloric acid, so you will see white mist. Hydrochloric acid is arbitrarily miscible with water and ethanol. Concentrated hydrochloric acid releases heat when diluted. Hydrogen chloride can be dissolved in benzene.

If 30% hydrochloric acid is stored in a steel-lined plastic storage tank, the operation should be closed and ventilation should be paid attention to because the hydrochloric acid is highly volatile. The specific operation is as mechanized and automated as possible. Operators must undergo special training and strictly abide by operating procedures.

It is recommended that operators wear self-priming filter gas masks, rubber acid and alkali resistant clothing, and rubber acid and alkali resistant gloves. Keep away from flammable and combustible materials. Prevent vapors from leaking into the workplace air.

Avoid contact with alkalis, amines, and alkali metals. When handling, load and unload with care to prevent damage to packaging and containers. Equipped with emergency response equipment for leaks. Empty containers may contain harmful substances.