hydrogen chloride

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　　Product Name: hydrogen chloride hydrochloric acid

　　Molecular formula: HCl

　　Description: colorless, toxic, corrosive, non burning gas, choking odor, strong stimulation of the upper respiratory tract, corrosion of the eyes, skin and mucous membranes. The proportion is greater than the air, and when wet air produces white smoke, it is easy to dissolve in water. Liquefied bottled gas, the pressure is its vapor pressure (41.7 kgf/cm2 @21.1 degrees C). High purity hydrogen chloride is mainly used in large-scale integrated circuit production, monocrystalline silicon gas phase polishing, epitaxial base corrosion.

　　Matters needing attention：

　　Hydrogen chloride meets white smoke in moist air. The concentration of smoke is related to the humidity of the air. Reactions with water produce large amounts of heat to form highly corrosive hydrochloric acid. A pungent acid that can be detected at very low levels (<5ppm). Direct contact with the skin can cause severe burns. When a leak occurs, it should be quickly evacuated from the contaminated area where the personnel are in charge of the wind and shall be isolated immediately. The 150m shall be isolated from the small leak and the 300m shall be isolated from the big leak, and the restriction shall be strictly restricted. It is recommended that emergency personnel wear self-contained positive pressure breathing apparatus and wear chemical protective clothing. Get into the field from the windward side. Cut off the leak as much as possible. Reasonable ventilation and accelerated diffusion. Neutralize ammonia or other dilute lye. To build a large number of wastewater barrierpit to contain the. If possible, return the residual gas or air escaping to the washing tower or in the fume hood attached to the tower. Leak containers should be properly handled, repaired, tested and then used.

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