| Harmonised Commodity Description and Coding System (HS) - level 3 - Heading | 
                    3815 | 
                    Reaction initiators & accelerators, catalytic prep, nes | 
                  
                
                  
                    | Combined nomenclature 8 digits | 
                    38151910 | 
                    Catalysts in the form of grains of which >= 90% by weight have a particle-size <= 10 micrometres, consisting of a mixture of oxides on a magnesium-silicate support, containing by weight >= 20% but <= 35% of copper and >= 2% but <= 3% of bismuth and of an apparent specific gravity of >= 0,2 but <= 1,0 | 
                  
                
                  
                    | Combined nomenclature 8 digits | 
                    38151990 | 
                    Supported catalysts, n.e.s. (excl. supported catalysts with precious metal, a precious-metal compound, nickel or a nickel compound as the active substance and catalysts in the form of grains of which >= 90% by weight have a particle-size <= 10 micrometres, consisting of a mixture of oxides on a magnesium-silicate support, containing by weight >= 20% but <= 35% of copper and >= 2% but <= 3% of bismuth and of an apparent specific gravity of >= 0,2 but <= 1,0) |