| Source | Description |
| | |
| U.S. Environmental Protection Agency | Descriptive and quantitative information on human health effects that may result from exposure to various chemicals in the environment. |
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| Toxnet: National Library of Medicine | Databases on toxicology, hazardous chemicals, environmental health, and toxic releases. |
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| Agency for Toxic Substances and Disease Registry | A federal public health agency of the U.S. Department of Health and Human Services that provides health information to prevent harmful exposures and diseases related to toxic substances. |
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| Substitute it Now: International Chemical Secretariat | Database containing substances with CMR (Carcinogenic, Mutagenic or Toxic to Reproduction) and PBT (Persistent, Bioaccumulative, and Toxic) properties. |
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| eChemPortal: Organisation for Economic Co-operation and Development | eChemPortal gives access to data submitted to government chemical review programmes at national, regional, and international levels. |
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| International Agency for Research on Cancer | Provides monographs on the evaluation of carcinogenic risk to humans. |
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| Toxipedia: Institute of Neurotoxicology and Neurological Disorders | Toxipedia is the free toxicological encyclopedia written by experts and edited for accuracy. |
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| Swedish Chemicals Agency | Works in Sweden and in the EU to promote legislation and rules that contributes to achieving the environmental quality objective of ´A non-toxic environment´. |