"compiles information from several government agencies and organizations. Available database reports include: "Physical Properties," "Exposure Guidelines," "NIOSH Pocket Guide," and "Emergency Response Information," including the DOT Emergency Response Guide."
"is a free-to-access collection of compound data from across the web, provided for the benefit of the community by the Royal Society of Chemistry (RSC). It aggregates chemical structures and their associated information into a single searchable repository and makes it available to everybody."
"provides detailed information on more than 11,200 chemicals, including all the chemicals used in large amounts in the United States and all the chemicals regulated under major environmental laws. You can search for information by typing in the chemical's name (or any common synonym) or the chemical's standard identification number (Chemical Abstracts Service or CAS registry number)."
"will allow the user to retreive information for any of 25,4945 hazardous chemicals or 'generic' entries based on a keyword search. Potential keywords include names, formula and registry numbers (CAS, DOT, RTECS, EINECS, PubChem, Beilstein and Merck). Formula are represented in Hill format for searching and a more descriptive format for viewing."