Substances used in the process step can be added via the "Used Substance" tab. In general, only CMR substances are added here, but this is not a requirement. When you add a CMR substance you are obliged to indicate why this substance should be used and not a non-CMR alternative. Furthermore, you must indicate how much you intend to use per process step of the substance, how long the expected exposure will be, how the substance will be used and in what form the substance will be used. These data are for the time being only administrative.