This is a free service providing a structure centric community for chemists. It provides access to millions of chemical structures and integration to a large number of other online services
This database contains the CAS Registry NumberĀ®, chemical names (both formal and common), molecular formulas, and structures or sequences for ~7900 chemicals of widespread general public interest.
Drugs.com is a site for drug information online. Providing free, peer-reviewed, accurate and independent advice on more than 24,000 prescription drugs, over-the-counter medicines & natural products.
SRS is the Environmental Protection Agency's central system for information about substances that are tracked/regulated by EPA or other sources. It is the authoritative resource for basic information about chemicals, biological organisms, and other substances of interest.
The ExPASy (Expert Protein Analysis System) proteomics server of the Swiss Institute of Bioinformatics (SIB) carry out the analysis of protein sequences and structures as well as 2-D PAGE (Disclaimer / References / Linking to ExPASy)
This contains information about experimentally-determined structures of proteins, nucleic acids, and complex assemblies. Also provides a variety of tools and resources
This is both a repository of inorganic chemistry teaching materials and a user-friendly platform for social networking tools that facilitate virtual collaboration and community building