The materials available within the Molecule Archive become manually and machine searchable through the samples' metadata generated in the Chemotion repository. The repository's GUI provides options for text and structure searching, allowing users to find the available metadata based on the samples' description which consists of provenance information, properties and the components given as molecular descriptors. Along with the samples' virtual representation, the analytical research data and the location and IDs of the materials are findable. The sample representation is assigned a DOI, and its metadata includes this DOI. The metadata scheme (adopted from DataCite) also contains additional provenance information, physical descriptors characterizing the sample, and the information on the ID of the physical sample as registered in the Molecule Archive. Also included are the DOI to the chemical reaction data that generated the sample (if available) and the DOIs to associated analytical details.