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Chemexper
Directory and searchable database for chemical names, molecular formulae, and CAS numbers.
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CHEMnetBASE
Portal to a wide range of chemical information for reference and research purposes.
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ChemSpider
Free chemical database searchable by chemical name and chemical structure, offering access to more than 26 million structures collected from a multitude of data sources.
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DIPPR 801
Design Institute for Physical Properties – a scientific project aims to provide information related to evaluated standard thermophysical property values.
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Elsevier MDL
Resource for research, innovation, and development in the field of discovery informatics.
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InfoChem GmbH
Features products and services specially developed for the chemoinformatics industry.
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The Nanogen Index
Index of information related to pesticides and other environmental contaminants.
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Organic Syntheses
Provides an annual compilation of procedures related to the synthesis of organic compounds.
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PubChem
Knowledge base sponsored by the National Library of Medicine. Provides information on the biological activities of small molecules.
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Reciprocal Net
Open, freely distributable, and extensible digital collection of molecular structures information.
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Specs
Offers the drug discovery industry with important chemistry and chemistry-related information and services.
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SyntheticPages
Free and interactive database providing information and procedures related to synthetic chemistry.