... handle the acid mist (H2SO1), hydrogen chloride (HC1) gas and hydrogen fluoride (HF) gas, chromium ac The main harmful ... can handle the acid mist (H2SO1), hydrogen chloride (HC1) gas and hydrogen fluoride (HF) gas, chromium acid mist (CrO3) Hydrocyanic ... ) , alkaline water-soluble vapor and other gases, using sodium hydroxide as the absorbing and liquid, solution concentration of 2-6%, the purification ...