For a high level of environmental and human health protection, manufacturers, importers, and downstream users must (self)classify and mark hazardous chemicals and mixtures.

To enable proper risk management, Classification and Labeling should be standardized across the EU for compounds that pose the highest risks (As they are carcinogenic, mutagenic, reproductive toxic, and respiratory sensitizers), as well as for other substances on an individual basis. Using uniform classification and labeling does this (CLH).

The CLP Regulation's Annex VI lists harmonized classifications, which all producers, importers, and downstream consumers of such compounds and mixes containing such substances must adhere to.

For compounds that do not currently have a listing in Annex VI of the CLP or those that do, CLH can be proposed.

Reference: Harmonised classification and labelling (CLH) - ECHA (europa.eu)