The main harmful gases can handle the acid mist (H2SO1), hydrogen chloride (HC1) gas and hydrogen fluoride (HF) ... gas, chromium ac The main harmful gases can handle the acid mist (H2SO1), hydrogen chloride (HC1) gas and hydrogen fluoride (HF ... ) gas, chromium acid mist (CrO3) Hydrocyanic acid gas (HCN), hydrogen sulfide (H2S), ammonia (NH3) , alkaline ...