[6] 171:00 171: 10 Single element gases other than halogens [6] . Nitrogen [6] Sulfur compounds [6] . Sulfur oxides (177:00 takes precedence) [6] . Hydrogen sulfide [6] Nitrogen compounds [6] . Nitrogen oxides (177:00 takes precedence) [6] . Ammonia [6] Simultaneously removing sulfur oxides and nitrogen oxides [6] Carbon oxides [6] Heavy metals or compounds thereof [6] Halogens or halogen compounds [6] . Organic halogen compounds [6] Organic compounds not provided for in groups 173:00 to 183:10 [6] . Hydrocarbons [6] Water [6] 171: 20 171: 30 171: 40 171: 50 . . . . Oxygen [6] Ozone [6] Hydrogen [6] Noble gases [6]
[6] Note Il est important de tenir compte du chapitre IV du Guide d’utilisation qui indique les règles concernant l’attribution et la présentation des différents types de codes d’indexation.