RPA is assisting Work Group 5 of the International Aerospace Environmental Group (IAEG) with an ongoing set of studies to map the supply chain for multiple compounds of concern used in the aerospace sector. The core aim of each study is to allow IAEG WG5 to understand the potential impact on the aerospace industry and its supply chain from a particular REACH Annex XIV listing, as well as the broader market for the substance(s) being assessed. These outputs may be used to formulate decisions and feed into any potential future REACH Authorisation activities.