an online resource intended to support researchers needing accurate journal bibliographic information.

This WebBook provides users with easy access to chemical and physical property data for chemical species through the internet.

an interactive table, that includes sections on isotopes, orbitals, and compounds

created by the chemists at The University of Nottingham

created by Theodore Gray and Element Collection Inc.

ChemSpider is a free chemical structure database providing fast text and structure search access to over 28 million structures from hundreds of data sources.