Reaxys is a powerful chemistry data-searching tool designed to retrieve chemical reactions, substances and their properties, patent data and more. Reaxys can be searched in a number of ways, including by chemical structure, formula, and physical property parameters. NOTE: A personal account is needed to use this database, click on 'Activate personalization' or 'Not registered?' to set up an account. The registration process only needs to be completed once.
A chemist-curated database from CAS offering reference, substance and reaction searching with sophisticated analysis tools. Substances can be searched by chemical structure, markush (for Patents), molecular formula, property or substance identifier. Includes MethodsNow (showing every experimental step for ease of replication) and PatentPak (identifying novel chemistry information in a Patent document).