Hydrochloric acid is a colorless liquid. It should be noted that industrial hydrochloric acid will be slightly yellow due to the impurity ferric salt. Hydrochloric acid is an aqueous solution of hydrogen chloride, with an irritating smell. Generally, hydrochloric acid used in the laboratory is 0.1mol/l, pH = 1. Due to the volatility of concentrated hydrochloric acid, the volatile hydrogen chloride gas interacts with the water vapor in the air to form small droplets of hydrochloric acid, so white mist will be seen. Hydrochloric acid is miscible with water and ethanol, concentrated hydrochloric acid is diluted to release heat, and hydrogen chloride is soluble in benzene.

If 30% hydrochloric acid is stored in steel lined plastic storage tank, due to the strong volatility of hydrochloric acid, it should be closed operation, pay attention to ventilation. The concrete operation is mechanization and automation as much as possible. Operators must be specially trained and strictly abide by the operating procedures.

It is recommended that operators wear self-priming filter gas mask, acid and alkali resistant rubber clothing and acid and alkali resistant rubber gloves. Keep away from inflammables and combustibles. Prevent vapor from leaking into the workplace air.

Avoid contact with alkali, amine and alkali metal. Handle with care to prevent damage to packaging and containers. Equipped with leakage emergency treatment equipment, empty containers may be left with harmful substances.