ChemSpider is a free search engine providing access to information on more than 28 million substances obtained from hundreds of data sources.
A vast and growing amount of chemical data can be found on the internet. The following resources are excellent starting points for locating reliable chemical information on the web.
Common Chemistry is a CAS Registry Number lookup service. Users may search by chemical name or registry number to find general information on approximately 7,800 compounds of interest to the public.
Public chemical search system maintained by the National Library of Medicine that provides information on the biological activities of small molecules.
Suite of public chemical databases maintained by the National Library of Medicine that provides access to toxicology, environmental and health information.
