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ECHA and the Member States first identify substances and their dossiers using an IT-based screening, and then carry out further checks by a manual screening. The main criteria for selecting a dossier for compliance check are:
- high tonnages;
- suspected data gaps in the higher-tier human health or environment information requirements;
- high potential for exposure of humans or environment (e.g. widespread uses or uncertain information on uses).
A detailed description of what is considered as high potential for exposure is available in the screening definition document.