20.13.00.Z0 Phosphides (excluding ferrophosphorus), whether or not chemically defined; hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 20.13.64.50; Other inorganic compounds n.e.c.; amalgams (excluding distilled and conductivity water and water of similar purity, liquid air and compressed air, those of precious metals) - EU Vocabularies
