Gases, such as ammonia, chlorine or hydrogen chloride, fluorine or hydrogen fluoride, carbon oxides, sulphur compounds, nitrogen oxides, hydrogen, sulphur dioxide, carbonyl chloride
kaasuja, kuten ammoniakkia, klooria tai vetykloridia, fluoria tai vetyfluoridia, hiilen oksideja, rikkiyhdisteitä, typen oksideja, vetyä, rikkidioksidia ja karbonyylikloridia