Substances of Potential Concern
Uses of substances with certain hazardous properties can be of concern for human health and/or the environment. Those substances that potentially have such properties need to be identified and subsequently processed using relevant regulatory steps to make sure that the risks associated with their use are properly addressed.
The chart below displays how the activities and regulatory processes relate to each other. It also shows the various lists of substances that result from the work of the authorities and are published by ECHA on its website.
The chart is a simplified representation of how the activities and processes are linked to each other. Substances might also enter one of the regulatory processes or activities at any point in time, without strictly following the flow represented in the chart.
More information on each activity, process and list is available by clicking on the specific sections in the chart below.

substances_potential_concern
REACH's Effect on Companies
Understanding REACH
2026-08-10
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