For a more general list of resources visit the Rainbow Workshop website:
http://www.rainbow-project.eu/insilico1.html

ESIS (European Chemical Substances Information System) ECB	IT System which provides information on chemicals	http://ecb.jrc.it/esis/
TOXNET US NIH	Cluster of databases on toxicology, hazardous chemicals, environmental health, and toxic releases.	http://toxnet.nlm.nih.gov/
DSSTox (Distributed Structure-Searchable Toxicity) Database Network US EPA	Public database network of downloadable, structure-searchable, standardized chemical structure files, associated with toxicity data.	http://www.epa.gov/ncct/dsstox/index.html
The Carcinogenic Potency DataBase (CPDB)	Standardized analyses of the results of 6540 chronic, long-term animal cancer tests.	http://potency.berkeley.edu/
The Pubchem Project US NIH	Provides information on biological activities of small molecules.	http://pubchem.ncbi.nlm.nih.gov/
Danish EPA (Q)SAR Database	Repository of estimates from over 70 (Q)SAR models for 166,072 chemicals. the (Q)SAR models encompass endpoints for physicochemical properties, fate, eco-toxicity, absorption, metabolism and toxicity.	http://ecb.jrc.it/qsar/qsar-tools/index.php?c=ddb
US National Toxicology Program (NTP) - Study Reports	Study reports on toxicological evaluations of substances of public health concern, performed under NTP's aegis.	http://ntp.niehs.nih.gov/
International Agency for Research on Cancer (IARC) Monographs	Critical reviews and evaluations of evidence on the carcinogenicity of human exposures	http://monographs.iarc.fr/
Survey Of Compounds (Commercial)	Electronic database that collects the contents of all published volumes of U.S. Public Health Service Publication No. 149, Survey of Compounds Which Have Been Tested for Carcinogenic Activity.	Not Available
C-QSAR (Commercial)	Database of over 14000 QSARs, divided in two major chemistry areas: biological and physical-organic	http://www.biobyte.com/bb/prod/cqsarad.html