The project aimed at bringing forward substances relevant for the environment in the Baltic Sea region, such as the recommendations on hazardous substances made through the HELCOM Baltic Sea Action Plan (BSAP) to the REACH candidate list. Selected substances were assessed to see if they fulfilled the REACH SVHC criteria, i.e. chemicals whose use would most likely be severely restricted in the future. The SIN-List is a database of 356 chemicals and chemical groups that fulfil the REACH SVHC criteria.