Overview
RISL is rail's version of the declarable-substance list. It follows the same idea as GADSL for cars or the IEC 62474 list for electronics, tuned to railway products.
Why sectors keep their own list
A general chemicals rule like REACH touches every industry, but each sector uses different materials and faces different sub-rules. A sector list narrows the universe of substances down to the ones that actually turn up in that industry's parts. That keeps declarations shorter and more consistent across the supply chain.
Note: Educational summary maintained by the Pareo team. Verify the current list against the official RISL.