Chemistry

CAS is the only organization in the world whose objective is to find, collect and organize all publicly disclosed substance information. We build and maintain the world's largest collection of molecular substances, reactions, and related content that is vital to the work of researchers.

"ChemSpider is a free chemical structure database providing fast access to over 63 million structures, properties, and associated information. By integrating and linking compounds from ~280 data sources, ChemSpider enables researchers to discover the most comprehensive view of freely available chemical data from a single online search. It is owned by the Royal Society of Chemistry."

ChemWeb.com provides access to the information chemists need to enhance their research, product development, self-development, education, and/or their businesses in Chemistry and related disciplines.

This site provides thermochemical, thermophysical, and ion energetics data compiled by NIST under the Standard Reference Data Program. The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.

This United States government website searches multiple government databases on toxicology. Researchers can choose to search multiple databases at the same time, or just one. These databases provide a variety of toxicology information and relevant citations.

spectroscopyNOW is the free access spectroscopy portal that fulfils the information needs of ALL spectroscopists. spectroscopyNOW.com has become the definitive spectroscopy resource on the internet, offering a wealth of valuable information, resources and services.

General industrial hygiene information on several hundred chemicals/classes. Presents key information: NIOSH recommended exposure limits, OSHA permissible exposure limits, and NIOSH immediately dangerous to life and health values (IDLH)--with linkouts to these databases. Also physical properties, personal protection recommendations, incompatibilities and reactivities, exposure routes, symptoms and more.

Rapid access to internationally peer reviewed information on chemicals commonly used throughout the world, which may also occur as contaminants in the environment and food. It consolidates information from a number of intergovernmental organizations whose goal it is to assist in the sound management of chemicals.