PubChem is an open archive of chemical substances and their biological experimental results from the National Institutes of Health (NIH). Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more.
ChemSpider is a free chemical structure database owned by the Royal Society of Chemistry providing fast access to over 120 million structures, along with properties and associated information. By integrating and linking compounds from hundreds of high quality data sources, ChemSpider enables researchers to discover the most comprehensive view of freely available chemical data from a single online search.
Maintained by the National Institute of Standards and Technology (NIST), this database provides access to a variety of physical and chemical property data on well defined chemical species and reactions.
This database contains detailed information about small molecule metabolites found in the human body intended to be used for applications in metabolomics, clinical chemistry, biomarker discovery and general education. The database is designed to contain or link chemical, clinical, and molecular biology/biochemistry data.
A database of enzyme information including reactions and metabolic products and substrates.
KEGG (Kyoto Encyclopedia of Genes and Genomes)
This collection of databases gives chemical compound information as well as pathway maps for molecular interactions and reactions.
Contains comprehensive information about chemicals, drugs, and biologicals. Includes over 12,000 monographs.
CRC Handbook of Chemistry and Physics
A hard-copy reference book with chemical and physical data.
