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Chemistry on the Web
Lots of useful information is provided free online by professional bodies, research councils or other universities. Here are some good sites:
PSDS - Physical Sciences Data-science Service
The Physical Sciences Data-science Service brings together tools and resources for UK researchers in physical sciences, including chemistry, crystallography, materials and related fields. It provides access to web-based data services which are freely accessible for academic users from the UK.
PubChem provides information on the biological activities of small molecules. The database is maintained by the US National Institutes of Health and has three main areas: Compounds, Substances and Bioassay.
ChemSpider is a chemical structure database from the Royal Society of Chemistry that provides fast access to over 30 million structures, properties and associated information.
Societies and organizations
American Chemical Society
American Institute of Chemical Engineers
European Federation of Chemical Engineering
European Process Safety Centre
Institution of Chemical Engineers
Royal Society of Chemistry
The Chemical Engineer news (IChemE)
Chemistry World news (RSC)