ChemSpider is a free database of chemical structures, chemical properties, NMR, IR, Raman, mass, UV VIS spectra, and crystallography data.

This database provides quick access to more than 100 million structures from hundreds of data sources.

Users must provide their .mol files in a machine-readable format that can be interpreted by Inchi. The repository also accepts files in sdf, Excel, csv, and tsv formats. Data can come from existing databases, companies, or individual researchers.

To access: http://www.chemspider.com/

For more information: https://blogs.rsc.org/chemspider/2018/06/26/behind-the-scenes-at-chemspider/?doing_wp_cron=1589472533.3953649997711181640625