Part 15 of the 2. Ontologies4Chem Workshop – 11./12.10.23 In this 2. workshop we deepened the discussions around the existing chemical ontologies to address questions around the need of being able to recommend them as canonical resources and around how to improve them. We also discussed tools that can be used in an ontology-based research data management context. Details: https://doi.org/10.25798/dd81-f712