As already mentioned, Annex XVII and the SVHC Candidate List provided a list of restricted substances. In theory, you could take the time to read through these lists and make sure that your products do not contain any of the listed substances.
However, this is not practical. In many cases, it could be difficult even to know what chemical substances are contained in your products. A lab testing company can help to assess which chemicals, heavy metals, and pollutants to test for, and perform the relevant tests.
Hence, if you work with a lab, as an importer you don’t need to keep track of all substances that might be restricted.