CN level

CN stands for the Combined Nomenclature for the classification of goods within the tariff and statistical nomenclature and on the Common Customs Tariff (Implementing Regulation (EU) 2017/1925, 12 October 2017).

The material composition dataset, designated in the model as ProdChar (stands for products characterization) defines totally 13135 types of products for CN 2007, where 9785 of those products refer to final goods as it is defined by the product life cycle phase.
The products considered in the model are defined by the fifth digit of disaggregation of the combined nomenclature (CN8).

In the online database data are presented at the CN4 and CN2 levels of disaggregation.

The ProdChar dataset was developed based on information about average materials composition supplied by different sources (more details provided in (Rosado, 2012)). For instance, the product type of CN 87032190 (motor cars and other motor vehicles principally designed for the transport of persons) comprises of 4% lubricants and oils and solvents, 22% plastics and rubber, 58% iron, steel alloying metals, and ferrous metals, 2% light metals, 4% nonferrous heavy metals, 1% sand (in the form of glass), 4% textile biomass, and 5% nonspecified (Rosado et al., 2014).

In concordance with their properties, all material flows in the model were split into 28 material categories (Table 3.2).

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