| Name | Website | Introduction |
| acs.org | acs.org | Primary professional organization for chemists and related occupations. |
| sigmaaldrich.com | sigmaaldrich.com | Manufacturer of laboratory reagents in all fields of life sciences, including biochemistry, molecular biology, cell culture and cell biology. |
| rsc.org | rsc.org | The RSC is the largest organisation in Europe for advancing the chemical sciences. Supported by a worldwide network of members and an international publishing business, its activities span education, conferences, science policy and the promotion of chemistry to the public. |
| chemistry.about.com | chemistry.about.com | News articles, periodic tables, educational resources, newsletters, and annotated links. |
| alliedelec.com | alliedelec.com | Distribution of electronic components and equipment. |
| pubchem.ncbi.nlm.nih.gov | pubchem.ncbi.nlm.nih.gov | Free database of chemical structures of small organic molecules and information on their biological activities. Linked with NIH PubMed/Entrez information retrieval system. |
| cas.org | cas.org | Produces the world’s largest databases of chemical information. |
| chemguide.co.uk | chemguide.co.uk | Resource for A Level chemistry students. |
| webqc.org | webqc.org | Online chemistry tools, forums, unit converters, symmetry tables, periodic table and chemical constants. |
| chemspider.com | chemspider.com | Free chemistry search engine which aggregates and indexes chemical structures and their associated information into a single searchable repository. |
| chemie.de | chemie.de | An information service for the German chemistry community. It provides search engines for chemistry and various databases for chemical information. |
| Rcsb.org/pdb/ | Rcsb.org/pdb/ | Archive of experimentally-determined, biological macromolecule 3-D structures from the Brookhaven National Laboratory. |
| organic-chemistry.org | organic-chemistry.org | Includes a searchable literature index, named reactions and protecting groups as well as a chemical database. |
| chemistry.msu.edu | chemistry.msu.edu | Information for current and prospective students. |
| scripps.edu | scripps.edu | Arnold and Mabel Beckman Center for Chemical Sciences. |
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