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Concerning classification criteria in Europe CLP (Regulation on Classification, Labelling and Packaging, Regulation (EC) No 1272/2008) and the five transport regulations (ADR, RID, ADN, IMDG, IATA/ICAO) are well harmonized.
Some hazards implemented in CLP, however, are not reflected in the transport regulations. For example transport classification criteria do not consider repeated exposure. On the other hand, some hazards are specific for transportation only.
Nevertheless, for the classification of substances or mixtures not “given by name” in ADR, Table 3.2, the relations between CLP and transport regulations are very helpful to allocate the correct dangerous goods classification.
The knoell guide to classification: Transport and CLP is intended to assist in identifying relations between the CLP and transport regulations. Each table displays a dangerous goods hazard class. Whenever possible the link to the corresponding CLP category is displayed and, the table shows which dangerous goods packing group has to be assigned to the product. If you can assign more than one hazard class, classification and packing group shall be determined in accordance with the table of precedence of hazards in 22.214.171.124 ADR.