* Strategy A: query ECHA database respective eChemPortal OECD:https://echa.europa.eu/information-on-chemicals/registered-substances \\ (mainly relevant for users responsible for BREF review in collaboration with ECHA).
  * Strategy B: Use sector-specific information on the processes to assign the technical and chemical functions to the chemicals or chemical groups. Compile and group substances according to the approach developed by B. Werschkun, 2020 [[https://www.syke.fi/en-US/Research__Development/Research_and_development_projects/Projects/Hazardous_industrial_chemicals_in_the_IED_BREFs_HAZBREF/Publications|(WP 2, Appendix 4)]]. Appropriate mainly for branch associations or TWG but helpful for all users: Describes how to group substances based on their technical and chemical function and contains explanation why this might be relevant information to determine substances of concern. Starting point are for example generic lists of substances compiled for respective industry based on technical and chemical functions.
  * Strategy D: conduct case studies (appropriate for TWG)
  * Safety data sheets: Use real information from the supply chain (identify components of products / mixutures), e.g. from safety data sheets: The basis or the safe use of substances are the safety data sheets, which contain information on substance properties and according to REACH may contain so-called exposure scenarios which might contain process-specific information.
  * Search for appropriate ERCs and SPERCs. Often ERCs or SPERCs are used for exposure assessment according to REACH. SPERCs in particular can contain process-specific information SPERCs:\\ https://echa.europa.eu/documents/10162/15669641/sperc_factsheet_guidance_en.pdf/4c94f0fb-07dd-4e9f-842a-3f21a63bd3fe \\ https://cefic.org/app/uploads/2019/01/SPERCs-Specific-Envirnonmental-Release-Classes-REACHImpl-ES-CSA-CSR.pdf \\ ERCs: (use descriptor system)\\ https://echa.europa.eu/documents/10162/13632/information_requirements_r12_en.pdf/ea8fa5a6-6ba1-47f4-9e47-c7216e180197
  * SPIN Database: http://spin2000.net/

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