A list of criteria for the selection of repositories relevant to the chemistry community has been developed. Repositories will be assessed on their maturity with respect to secure and sustainable operations, reliable data publication and long-term data preservation and accessibility. They should meet the selected requirements and recommendations and, if they do not yet do so, declare their willingness to meet the other missing requirements. These repositories will be recommended in an article to be published in the NFDI4Chem Knowledge Base: the article will serve as a guide for repository managers to understand what criteria need to be met in order to be included in the NFDI4Chem repository federation. The criteria were categorised into mandatory, recommended and optional.